Title: Fatal error on plugin activation – WP-CLI Last modified: January 6, 2022 --- # Fatal error on plugin activation – WP-CLI * Resolved [Kylen Downs](https://wordpress.org/support/users/kdowns/) * (@kdowns) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/) * When installing and activating the most recent version (5.169.1) through WP-CLI, the plugin outputs the following fatal error and fails to activate. * ``` $ wp plugin install cleantalk-spam-protect --activate Installing Spam protection, AntiSpam, FireWall by CleanTalk (5.169.1) Downloading installation package from https://downloads.wordpress.org/plugin/cleantalk-spam-protect.5.169.1.zip... Unpacking the package... Installing the plugin... Plugin installed successfully. Activating 'cleantalk-spam-protect'... Fatal error: Uncaught Error: Call to undefined function Cleantalk\ApbctWP\apbct_settings__get_ajax_type() in local/Sites/test/wp-content/plugins/cleantalk-spam-protect/lib/Cleantalk/ApbctWP/Activator.php:15 Stack trace: #0 local/Sites/test/wp-content/plugins/cleantalk-spam-protect/cleantalk.php(408): Cleantalk\ApbctWP\Activator::activation(NULL) #1 local/Sites/test/wp-includes/class-wp-hook.php(303): apbct_activation(NULL) #2 local/Sites/test/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters('', Array) #3 local/Sites/test/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #4 local/Sites/test/wp-admin/includes/plugin.php(698): do_action('activate_cleant...', NULL) #5 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/extension-command/src/Plugin_Command.php(333): activate_plugin('cleantalk-spam-...', '', NULL) #6 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/extension-command/src/WP_CLI/CommandWithUpgrade.php(250): Plugin_Command->activate(Array) #7 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/extension-command/src/Plugin_Command.php(809): WP_CLI\CommandWithUpgrade->install(Array, Array) #8 [internal function]: Plugin_Command->install(Array, Array) #9 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CommandFactory.php(100): call_user_func(Array, Array, Array) #10 [internal function]: WP_CLI\Dispatcher\CommandFactory::WP_CLI\Dispatcher\{closure}(Array, Array) #11 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/Subcommand.php(491): call_user_func(Object(Closure), Array, Array) #12 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(399): WP_CLI\Dispatcher\Subcommand->invoke(Array, Array, Array) #13 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(422): WP_CLI\Runner->run_command(Array, Array) #14 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1194): WP_CLI\Runner->run_command_and_exit() #15 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php(23): WP_CLI\Runner->start() #16 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php(77): WP_CLI\Bootstrap\LaunchRunner->process(Object(WP_CLI\Bootstrap\BootstrapState)) #17 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php(27): WP_CLI\bootstrap() #18 phar:///usr/local/Cellar/wp-cli/2.5.0/bin/wp/php/boot-phar.php(11): include('phar:///usr/loc...') #19 /usr/local/Cellar/wp-cli/2.5.0/bin/wp(4): include('phar:///usr/loc...') #20 {main} thrown in local/Sites/test/wp-content/plugins/cleantalk-spam-protect/lib/Cleantalk/ApbctWP/Activator.php on line 15 ``` * Attempting to activate the currently inactive plugin with `wp plugin activate cleantalk-spam-protect`, it outputs the same fatal error. * The plugin does activate without issue from the WordPress dashboard. Viewing 8 replies - 1 through 8 (of 8 total) * Plugin Support [sergecleantalk](https://wordpress.org/support/users/sergecleantalk/) * (@sergecleantalk) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15226920) * Hello, * Could you tell us your webserver PHP version and WordPress version? * Thread Starter [Kylen Downs](https://wordpress.org/support/users/kdowns/) * (@kdowns) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15228837) * Tested on a couple of production sites running WP 5.8.2 + PHP 7.4 as well as a local site running WP 5.8.3 + PHP 8.0. * Plugin Support [sergecleantalk](https://wordpress.org/support/users/sergecleantalk/) * (@sergecleantalk) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15228925) * I’ve tried to install and activate 5.169.1 on WordPress 5.8.3 + PHP 7.4 and found no problems. We also didn’t receive such reports yet. Seems like another plugin is interfering with Anti-Spam. Could you try to disable plugins one by one? * Thread Starter [Kylen Downs](https://wordpress.org/support/users/kdowns/) * (@kdowns) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15229102) * I set the active theme to twentytwenty and deactivated all other plugins. WP- CLI is still outputting that error referencing cleantalk-spam-protect/lib/Cleantalk/ ApbctWP/Activator.php:15 * *Note this is a fresh install of CleanTalk and so has not been connected to the API or had an access key submitted. * I did run a test where I added an access key and verified the connection. I then deactivated the CleanTalk plugin and again attempted to activate it via WP-CLI. Same error. * I’m running WP-CLI 2.5.0 on local and the prod sites were running 2.4.0. * Plugin Support [sergecleantalk](https://wordpress.org/support/users/sergecleantalk/) * (@sergecleantalk) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15229167) * We will test WP-CLI 2.5.0 in our environment and contact you. It may take 2-3 business days. * Plugin Support [amagsumov](https://wordpress.org/support/users/amagsumov/) * (@amagsumov) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15234561) * Hello [@kdowns](https://wordpress.org/support/users/kdowns/) * We’ve fixed the issue. Please install fix version: [https://github.com/CleanTalk/wordpress-antispam/releases/download/fix-version/cleantalk-spam-protect.zip](https://github.com/CleanTalk/wordpress-antispam/releases/download/fix-version/cleantalk-spam-protect.zip) * – Go to WordPress Administrator Panel —> Plugins. * – Find the plugin “Anti-Spam by CleanTalk” —> Deactivate. * – After the automatic page refreshing find the plugin again “Anti-Spam by CleanTalk”— > Delete. Confirm files deletion. * – Download the plugin archive from the link. * – Go to Plugins —> Add New —> Upload Plugin. * – Choose the downloaded archive and press “Install Now”. * Did it help? * Thread Starter [Kylen Downs](https://wordpress.org/support/users/kdowns/) * (@kdowns) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15236135) * Cheers! Looks like that fix is working. Thank you! * [SergeM](https://wordpress.org/support/users/serge00/) * (@serge00) * [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15236184) * You are welcome, [@kdowns](https://wordpress.org/support/users/kdowns/)! Viewing 8 replies - 1 through 8 (of 8 total) The topic ‘Fatal error on plugin activation – WP-CLI’ is closed to new replies. * ![](https://ps.w.org/cleantalk-spam-protect/assets/icon-256x256.gif?rev=3539767) * [Anti Spam for Contact Forms, Comments & Online Stores - CleanTalk](https://wordpress.org/plugins/cleantalk-spam-protect/) * [Frequently Asked Questions](https://wordpress.org/plugins/cleantalk-spam-protect/#faq) * [Support Threads](https://wordpress.org/support/plugin/cleantalk-spam-protect/) * [Active Topics](https://wordpress.org/support/plugin/cleantalk-spam-protect/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/cleantalk-spam-protect/unresolved/) * [Reviews](https://wordpress.org/support/plugin/cleantalk-spam-protect/reviews/) * 8 replies * 4 participants * Last reply from: [SergeM](https://wordpress.org/support/users/serge00/) * Last activity: [4 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-on-plugin-activation-wp-cli/#post-15236184) * Status: resolved