Title: Plugin won’t activate Last modified: November 30, 2018 --- # Plugin won’t activate * Resolved [spfitzg](https://wordpress.org/support/users/spfitzg/) * (@spfitzg) * [7 years, 6 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/) * Trying to activate the plugin on WordPress 4.9.8. I get the below error when attempting to activate. Any suggestions? * `/Fatal error: Can’t use method return value in write context in /home/abc1234/ public_html/staff/wp-content/plugins/private-google-calendars/private-google- calendars.php on line 231 Viewing 13 replies - 1 through 13 (of 13 total) * Plugin Author [michielve](https://wordpress.org/support/users/michielve/) * (@michielve) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11022991) * Hi, Thanks for reporting and sorry for my late response. I guess you use PHP < 5.6. I released a new version that should work with PHP 5.4. Michiel * Thread Starter [spfitzg](https://wordpress.org/support/users/spfitzg/) * (@spfitzg) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11023481) * Thanks. I was able to get it activated, but even though everything is setup correctly when I use the pgc shortcode nothing is displayed. Any suggestions? * Plugin Author [michielve](https://wordpress.org/support/users/michielve/) * (@michielve) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11023838) * There can be many causes. Some things you can do: – First see in the settings if everything is still setup correctly (the “Verify” button). – Make sure you have selected some calendars in the settings – Try the widget display – does that work? – Look in the console of your browser if there are displayed any errors( you can send them to me here and I can have a look). * Thread Starter [spfitzg](https://wordpress.org/support/users/spfitzg/) * (@spfitzg) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11023886) * I’m getting the following error: * TypeError: undefined is not an object (evaluating ‘$.fullCalendar.locales’) ( anonymous function) — bb58d.js:22 each — 3a3f1.js:2:2886 each — 3a3f1.js:2:851( anonymous function) — bb58d.js:14 Global Code — bb58d.js:133 setupMobileItemAnimations— b8572.js:1:5269 * Plugin Author [michielve](https://wordpress.org/support/users/michielve/) * (@michielve) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11023976) * It looks like the locale-all.js file is not loaded, I don’t know why that is the case with your installation. The other functions like setupMobileItemAnimations don’t look familiar to me. * However I added a check now so this error should be resolved. If you have another issue, please send me the WordPress URL where I can see this error. * Thread Starter [spfitzg](https://wordpress.org/support/users/spfitzg/) * (@spfitzg) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11024471) * I updated the plugin. I clicked on ‘Verify’ and was told my setup was ok. I verified a calendar was checked. On the widget I selected my calendar. I’m still getting a blank page.I’m still getting the error: * TypeError: undefined is not an object (evaluating ‘$.fullCalendar.locales’) ( anonymous function) — bb58d.js:3:410 each — 3a3f1.js:2:2886 each — 3a3f1.js:2: 851 (anonymous function) — bb58d.js:3 Global Code — bb58d.js:13 * Plugin Author [michielve](https://wordpress.org/support/users/michielve/) * (@michielve) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11024948) * If you send me the URL of the page where I can see this error I can have a look. * Thread Starter [spfitzg](https://wordpress.org/support/users/spfitzg/) * (@spfitzg) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11026048) * The page is password protected along with the rest of the site. Let me see what I can do. * Thread Starter [spfitzg](https://wordpress.org/support/users/spfitzg/) * (@spfitzg) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11030973) * I added the plugin to another wordpress site I have set up for testing. One I revoked access to clear the refresh token issue and reconnected the plugin it worked fine. My guess is that the plugin is conflicting with another plugin. I just don’t know which one. * Plugin Author [michielve](https://wordpress.org/support/users/michielve/) * (@michielve) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11031760) * Good to hear that the plugin is working fine on another website. If you are able to send me a public URL where I can see the issue, or if you can find out which plugin it conflicts with, I can have a look. * Thread Starter [spfitzg](https://wordpress.org/support/users/spfitzg/) * (@spfitzg) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11032874) * I disabled each of my plugins one by one. The issue seems to be with the W3 Total Cache plugin. When I disable it the calendar works fine. Ideally, I’d like to not have to disable the plugin. * Plugin Author [michielve](https://wordpress.org/support/users/michielve/) * (@michielve) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11034918) * I checked it with the W3 Total Cache plugin and I get the same error. I don’t know yet why this happens, but if you disable the “minify” option, the plugin works fine again. I’ll see if and when I have time to investigate this further. * Plugin Author [michielve](https://wordpress.org/support/users/michielve/) * (@michielve) * [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11035313) * I added info to this plugin in the FAQ section about how to use it with W3 Total Cache plugin. You can use it with minify enabled. I regard this now as solved, so I close this issue. Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Plugin won’t activate’ is closed to new replies. * ![](https://ps.w.org/private-google-calendars/assets/icon-256x256.png?rev=2203549) * [Private Google Calendars](https://wordpress.org/plugins/private-google-calendars/) * [Frequently Asked Questions](https://wordpress.org/plugins/private-google-calendars/#faq) * [Support Threads](https://wordpress.org/support/plugin/private-google-calendars/) * [Active Topics](https://wordpress.org/support/plugin/private-google-calendars/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/private-google-calendars/unresolved/) * [Reviews](https://wordpress.org/support/plugin/private-google-calendars/reviews/) * 13 replies * 2 participants * Last reply from: [michielve](https://wordpress.org/support/users/michielve/) * Last activity: [7 years, 5 months ago](https://wordpress.org/support/topic/plugin-wont-activate-33/#post-11035313) * Status: resolved