Title: Error when activating plugin Last modified: September 1, 2016 --- # Error when activating plugin * [azmiqudsi](https://wordpress.org/support/users/azmiqudsi/) * (@azmiqudsi) * [9 years, 10 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/) * When I activate the plugin I get this error message, please help. I am using the shapely theme on my website and using wordpress 4.5.3, everything is fine and up to date and all the other plugins work except wp-members. I’d appreciate a fix for this problem. Thanks * ``` Array_key_exists() expects parameter 2 to be array, boolean given in C:\wamp\www\wordpress\wp-content\plugins\wp-members-master\wp-members-install.php on line 464 Call Stack # Time Memory Function Location 1 0.0004 136800 {main}( ) ...\plugins.php:0 2 0.0009 141424 require_once( 'C:\wamp\www\wordpress\wp-admin\network\admin.php' ) ...\plugins.php:11 3 0.0016 185360 require_once( 'C:\wamp\www\wordpress\wp-admin\admin.php' ) ...\admin.php:13 4 0.0019 197792 require_once( 'C:\wamp\www\wordpress\wp-load.php' ) ...\admin.php:31 5 0.0022 206856 require_once( 'C:\wamp\www\wordpress\wp-config.php' ) ...\wp-load.php:37 6 0.0027 285784 require_once( 'C:\wamp\www\wordpress\wp-settings.php' ) ...\wp-config.php:97 7 0.5484 25967032 do_action( ) ...\wp-settings.php:377 8 0.5485 25968344 call_user_func_array:{C:\wamp\www\wordpress\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 9 0.5485 25968448 wpmem_init( ) ...\plugin.php:525 10 0.5496 26071240 WP_Members->__construct( ) ...\wp-members.php:113 11 0.5510 26124832 wpmem_upgrade_settings( ) ...\class-wp-members.php:55 12 0.5510 26124856 wpmem_upgrade_dialogs( ) ...\wp-members-install.php:170 13 0.5514 26125112 array_key_exists ( ) ...\wp-members-install.php:464 ( ! ) Warning: Invalid argument supplied for foreach() in C:\wamp\www\wordpress\wp-content\plugins\wp-members-master\wp-members-install.php on line 468 Call Stack # Time Memory Function Location 1 0.0004 136800 {main}( ) ...\plugins.php:0 2 0.0009 141424 require_once( 'C:\wamp\www\wordpress\wp-admin\network\admin.php' ) ...\plugins.php:11 3 0.0016 185360 require_once( 'C:\wamp\www\wordpress\wp-admin\admin.php' ) ...\admin.php:13 4 0.0019 197792 require_once( 'C:\wamp\www\wordpress\wp-load.php' ) ...\admin.php:31 5 0.0022 206856 require_once( 'C:\wamp\www\wordpress\wp-config.php' ) ...\wp-load.php:37 6 0.0027 285784 require_once( 'C:\wamp\www\wordpress\wp-settings.php' ) ...\wp-config.php:97 7 0.5484 25967032 do_action( ) ...\wp-settings.php:377 8 0.5485 25968344 call_user_func_array:{C:\wamp\www\wordpress\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 9 0.5485 25968448 wpmem_init( ) ...\plugin.php:525 10 0.5496 26071240 WP_Members->__construct( ) ...\wp-members.php:113 11 0.5510 26124832 wpmem_upgrade_settings( ) ...\class-wp-members.php:55 12 0.5510 26124856 wpmem_upgrade_dialogs( ) ...\wp-members-install.php:170 ( ! ) Warning: array_key_exists() expects parameter 2 to be array, boolean given in C:\wamp\www\wordpress\wp-content\plugins\wp-members-master\wp-members-install.php on line 175 Call Stack # Time Memory Function Location 1 0.0004 136800 {main}( ) ...\plugins.php:0 2 0.0009 141424 require_once( 'C:\wamp\www\wordpress\wp-admin\network\admin.php' ) ...\plugins.php:11 3 0.0016 185360 require_once( 'C:\wamp\www\wordpress\wp-admin\admin.php' ) ...\admin.php:13 4 0.0019 197792 require_once( 'C:\wamp\www\wordpress\wp-load.php' ) ...\admin.php:31 5 0.0022 206856 require_once( 'C:\wamp\www\wordpress\wp-config.php' ) ...\wp-load.php:37 6 0.0027 285784 require_once( 'C:\wamp\www\wordpress\wp-settings.php' ) ...\wp-config.php:97 7 0.5484 25967032 do_action( ) ...\wp-settings.php:377 8 0.5485 25968344 call_user_func_array:{C:\wamp\www\wordpress\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 9 0.5485 25968448 wpmem_init( ) ...\plugin.php:525 10 0.5496 26071240 WP_Members->__construct( ) ...\wp-members.php:113 11 0.5510 26124832 wpmem_upgrade_settings( ) ...\class-wp-members.php:55 12 0.5586 26125952 array_key_exists ( ``` * [https://wordpress.org/plugins/wp-members/](https://wordpress.org/plugins/wp-members/) Viewing 7 replies - 1 through 7 (of 7 total) * Plugin Author [Chad Butler](https://wordpress.org/support/users/cbutlerjr/) * (@cbutlerjr) * [9 years, 10 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7620798) * The places where this is failing are related to some of the plugin’s stored settings that, based on the errors you have displayed, don’t seem to be loaded properly. * Looking at the directory \wp-members-master\ my question is where did you get the original install package? Was this downloaded from GitHub? And if so, what specific package? * If this was loaded directly from wordpress.org, generally, the directory is going to be /wp-members/. * The directory name itself doesn’t really matter for the plugin to operate, but in trying to figure out why you don’t seem to have a clean install it makes me question whether you’ve got something out of date (such as the BlueHost mirror at [https://github.com/wp-plugins/wp-members](https://github.com/wp-plugins/wp-members) which is severely out of date) or something beta (such as my repo here: [https://github.com/butlerblog/wp-members/](https://github.com/butlerblog/wp-members/)). * In either case, I think what you need to do is clear things out and reinstall. In order to make sure that reinstalling results in a clean install, you need to deactivate the plugin in the WP plugin panel, then run the delete option in the plugin panel to make sure that any db settings are removed. Then install the package from here on wordpress.org. * Thread Starter [azmiqudsi](https://wordpress.org/support/users/azmiqudsi/) * (@azmiqudsi) * [9 years, 10 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7620820) * Thank you for the quick reply. I’ve actually downloaded and tried several versions of the plugin some of which i found on gethub and some i downloaded from here at wordpress.org, and no matter which version i download i always seem to stumble upon the same error message when activating the plugin. But nevertheless i’ll try to re-install the plugin one more time as you suggested as soon as possible and reply with the result. * Thread Starter [azmiqudsi](https://wordpress.org/support/users/azmiqudsi/) * (@azmiqudsi) * [9 years, 10 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7620872) * Still the same warning error even after downloading it from wordpress.org, this is what I get: “The plugin generated 17850 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.” alongside these * ``` ( ! ) Warning: array_key_exists() expects parameter 2 to be array, boolean given in C:\wamp\www\wordpress\wp-content\plugins\wp-members\wp-members-install.php on line 464 Call Stack # Time Memory Function Location 1 0.0004 136760 {main}( ) ...\plugins.php:0 2 0.0009 141384 require_once( 'C:\wamp\www\wordpress\wp-admin\network\admin.php' ) ...\plugins.php:11 3 0.0015 185320 require_once( 'C:\wamp\www\wordpress\wp-admin\admin.php' ) ...\admin.php:13 4 0.0018 197752 require_once( 'C:\wamp\www\wordpress\wp-load.php' ) ...\admin.php:31 5 0.0020 206816 require_once( 'C:\wamp\www\wordpress\wp-config.php' ) ...\wp-load.php:37 6 0.0026 285744 require_once( 'C:\wamp\www\wordpress\wp-settings.php' ) ...\wp-config.php:97 7 0.5276 25968584 do_action( ) ...\wp-settings.php:377 8 0.5277 25969896 call_user_func_array:{C:\wamp\www\wordpress\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 9 0.5277 25970016 wpmem_init( ) ...\plugin.php:525 10 0.5288 26072456 WP_Members->__construct( ) ...\wp-members.php:113 11 0.5302 26126008 wpmem_upgrade_settings( ) ...\class-wp-members.php:55 12 0.5302 26126032 wpmem_upgrade_dialogs( ) ...\wp-members-install.php:170 13 0.5306 26126288 array_key_exists ( ) ...\wp-members-install.php:464 ( ! ) Warning: Invalid argument supplied for foreach() in C:\wamp\www\wordpress\wp-content\plugins\wp-members\wp-members-install.php on line 468 Call Stack # Time Memory Function Location 1 0.0004 136760 {main}( ) ...\plugins.php:0 2 0.0009 141384 require_once( 'C:\wamp\www\wordpress\wp-admin\network\admin.php' ) ...\plugins.php:11 3 0.0015 185320 require_once( 'C:\wamp\www\wordpress\wp-admin\admin.php' ) ...\admin.php:13 4 0.0018 197752 require_once( 'C:\wamp\www\wordpress\wp-load.php' ) ...\admin.php:31 5 0.0020 206816 require_once( 'C:\wamp\www\wordpress\wp-config.php' ) ...\wp-load.php:37 6 0.0026 285744 require_once( 'C:\wamp\www\wordpress\wp-settings.php' ) ...\wp-config.php:97 7 0.5276 25968584 do_action( ) ...\wp-settings.php:377 8 0.5277 25969896 call_user_func_array:{C:\wamp\www\wordpress\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 9 0.5277 25970016 wpmem_init( ) ...\plugin.php:525 10 0.5288 26072456 WP_Members->__construct( ) ...\wp-members.php:113 11 0.5302 26126008 wpmem_upgrade_settings( ) ...\class-wp-members.php:55 12 0.5302 26126032 wpmem_upgrade_dialogs( ) ...\wp-members-install.php:170 ( ! ) Warning: array_key_exists() expects parameter 2 to be array, boolean given in C:\wamp\www\wordpress\wp-content\plugins\wp-members\wp-members-install.php on line 175 Call Stack # Time Memory Function Location 1 0.0004 136760 {main}( ) ...\plugins.php:0 2 0.0009 141384 require_once( 'C:\wamp\www\wordpress\wp-admin\network\admin.php' ) ...\plugins.php:11 3 0.0015 185320 require_once( 'C:\wamp\www\wordpress\wp-admin\admin.php' ) ...\admin.php:13 4 0.0018 197752 require_once( 'C:\wamp\www\wordpress\wp-load.php' ) ...\admin.php:31 5 0.0020 206816 require_once( 'C:\wamp\www\wordpress\wp-config.php' ) ...\wp-load.php:37 6 0.0026 285744 require_once( 'C:\wamp\www\wordpress\wp-settings.php' ) ...\wp-config.php:97 7 0.5276 25968584 do_action( ) ...\wp-settings.php:377 8 0.5277 25969896 call_user_func_array:{C:\wamp\www\wordpress\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 9 0.5277 25970016 wpmem_init( ) ...\plugin.php:525 10 0.5288 26072456 WP_Members->__construct( ) ...\wp-members.php:113 11 0.5302 26126008 wpmem_upgrade_settings( ) ...\class-wp-members.php:55 12 0.5379 26127128 array_key_exists ( ) ...\wp-members-install.php:175 ``` * Thread Starter [azmiqudsi](https://wordpress.org/support/users/azmiqudsi/) * (@azmiqudsi) * [9 years, 10 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7620942) * **UPDATE** I’ve managed to get the plugin working. However, whenever I go to the user edit page I get this message at the bottom of the page under the additional fields section (everything is showing and working except the additional fields which -even if disabled- still show this error message) * ``` ( ! ) Warning: Invalid argument supplied for foreach() in C:\wamp\www\azmi\wp-content\plugins\wp-members\admin\user-profile.php on line 72 Call Stack # Time Memory Function Location 1 0.0007 135816 {main}( ) ...\user-edit.php:0 2 0.7557 31126584 require( 'C:\wamp\www\azmi\wp-admin\user-edit.php' ) ...\user-edit.php:16 3 0.8421 31425320 do_action( ) ...\user-edit.php:598 4 0.8421 31426248 call_user_func_array:{C:\wamp\www\azmi\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 5 0.8421 31426376 wpmem_admin_fields( ) ...\plugin.php:525 ``` * I also get this error whenever I update a profile’s info (when I revisit the page the update is applied but every time I make an update I get this error and can’t do anything except closing the tab and reopening the website) * ``` ( ! ) Warning: Invalid argument supplied for foreach() in C:\wamp\www\azmi\wp-content\plugins\wp-members\admin\user-profile.php on line 208 Call Stack # Time Memory Function Location 1 0.0005 145032 {main}( ) ...\user-edit.php:0 2 0.7299 31139448 require( 'C:\wamp\www\azmi\wp-admin\user-edit.php' ) ...\user-edit.php:16 3 0.7340 31160416 do_action( ) ...\user-edit.php:134 4 0.7340 31161304 call_user_func_array:{C:\wamp\www\azmi\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 5 0.7340 31161344 ffl_save_extra_profile_fields( ) ...\plugin.php:525 6 0.7345 31161824 wp_update_user( ) ...\force-first-last.php:50 7 0.7356 31160904 wp_insert_user( ) ...\user.php:1761 8 0.7419 31194320 do_action( ) ...\user.php:1661 9 0.7425 31198064 call_user_func_array:{C:\wamp\www\azmi\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 10 0.7425 31198160 wpmem_admin_update( ) ...\plugin.php:525 ( ! ) Warning: Invalid argument supplied for foreach() in C:\wamp\www\azmi\wp-content\plugins\wp-members\admin\user-profile.php on line 208 Call Stack # Time Memory Function Location 1 0.0005 145032 {main}( ) ...\user-edit.php:0 2 0.7299 31139448 require( 'C:\wamp\www\azmi\wp-admin\user-edit.php' ) ...\user-edit.php:16 3 0.7463 31182328 edit_user( ) ...\user-edit.php:147 4 0.7470 31187416 wp_update_user( ) ...\user.php:182 5 0.7638 31229888 wp_insert_user( ) ...\user.php:1761 6 0.7690 31237760 do_action( ) ...\user.php:1661 7 0.7696 31241272 call_user_func_array:{C:\wamp\www\azmi\wp-includes\plugin.php:525} ( ) ...\plugin.php:525 8 0.7696 31241288 wpmem_admin_update( ) ...\plugin.php:525 ( ! ) Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\www\azmi\wp-content\plugins\wp-members\admin\user-profile.php:208) in C:\wamp\www\azmi\wp-includes\pluggable.php on line 1167 Call Stack # Time Memory Function Location 1 0.0005 145032 {main}( ) ...\user-edit.php:0 2 0.7299 31139448 require( 'C:\wamp\www\azmi\wp-admin\user-edit.php' ) ...\user-edit.php:16 3 1.7822 31817968 wp_redirect( ) ...\user-edit.php:158 4 1.7823 31825320 header ( ) ...\pluggable.php:1167 ``` * Can you help me with this please?? * Plugin Author [Chad Butler](https://wordpress.org/support/users/cbutlerjr/) * (@cbutlerjr) * [9 years, 10 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7620959) * Like the issues you indicated before, this appears to be related to incomplete settings for the plugin. The two issues you have here are related to what would appear to be an empty set of custom fields. The plugin installs a series of default custom fields at install, which it doesn’t look like you’ve got (hence the error). * Take a look at the plugin’s fields tab. Are there any fields in it? If so, what is there? * Could you also indicate the following: * WP version? PHP version? MySQL version? * What webserver is this running – is it Apache or something else? * What other plugins are installed? * Thread Starter [azmiqudsi](https://wordpress.org/support/users/azmiqudsi/) * (@azmiqudsi) * [9 years, 10 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7620990) * There is only one field which cannot be removed, I’m guessing it’s the username field since it’s the only field showing on the registration form for the users but the field name itself isn’t showing for me (I guess this is a good time to say I can’t add fields) [https://www.dropbox.com/s/v9vyxotii4z1ckh/field.png?dl=0](https://www.dropbox.com/s/v9vyxotii4z1ckh/field.png?dl=0) My wordpress version is 4.5.3, my PHP version is 5.6.19 and my MySQL version is 5.7.11 – MySQL Community Server (GPL) The website is running on Apache I have about 20 plugins (19 + WP-Members) and you can find them in the picture below [https://www.dropbox.com/s/sjd8p5n1uuxxi11/Plugins.png?dl=0](https://www.dropbox.com/s/sjd8p5n1uuxxi11/Plugins.png?dl=0) * Plugin Author [Chad Butler](https://wordpress.org/support/users/cbutlerjr/) * (@cbutlerjr) * [9 years, 9 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7621060) * This appears to be a network (multisite) install. Only one time has anyone reported a similar issue – which is basically not getting an installation of the default fields into the options table. Unfortunately, I cannot locate what that person reported the solution as. * Does this truly need to be a multisite install? Or are you using multisite just because you can? Since many people use multisite in a way that it was not intended, I suggest reading a great post from [Ipstenu](https://profiles.wordpress.org/ipstenu) on [whether multisite is the right option](https://halfelf.org/2011/dont-use-wordpress-multisite/) for you. * If multisite is right for you, I would look at how you are installing. The plugin does allow for both network activation and individual site activation, but clearly something is preventing complete installation with the process you are invoking. So I would suggest attempting the opposite of that. So if you’re attempting a network activation, try site activation instead. * When you get a complete install, the fields tab should resemble the image here: [http://rocketgeek.com/plugins/wp-members/docs/plugin-settings/fields/](http://rocketgeek.com/plugins/wp-members/docs/plugin-settings/fields/) Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘Error when activating plugin’ is closed to new replies. * ![](https://ps.w.org/wp-members/assets/icon-256x256.png?rev=1226414) * [WP-Members Membership Plugin](https://wordpress.org/plugins/wp-members/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-members/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-members/) * [Active Topics](https://wordpress.org/support/plugin/wp-members/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-members/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-members/reviews/) ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * 7 replies * 2 participants * Last reply from: [Chad Butler](https://wordpress.org/support/users/cbutlerjr/) * Last activity: [9 years, 9 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-26/#post-7621060) * Status: not resolved