Title: Unknown error
Last modified: April 23, 2021

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# Unknown error

 *  [Argentum](https://wordpress.org/support/users/argentum/)
 * (@argentum)
 * [5 years ago](https://wordpress.org/support/topic/unknown-error-35/)
 * Hi,
    I added the plugin today. Worked for a couple of hours.
 * Now I get a “Unknown error”. I guess it has something to do with JS combine of
   Litespeed cache. Per your documentation I added these scripts to the caching 
   plugin’s javascript excludes.
 * wp-content/plugins/private-google-calendars/lib/fullcalendar4/core/main.min.js
   
   wp-content/plugins/private-google-calendars/lib/fullcalendar4/core/locales-all.
   min.js wp-content/plugins/private-google-calendars/lib/fullcalendar4/list/main.
   min.js wp-content/plugins/private-google-calendars/lib/fullcalendar4/timegrid/
   main.min.js
 * Dev Console shows these errors:
    Failed to load resource: the server responded
   with a status of 403 () /wp-admin/admin-ajax.php
 * TypeError: Cannot use ‘in’ operator to search for ‘error’ in -1
    at XMLHttpRequest.
   xhr.onload (02b47.js?adafb:46) xhr.onload @ 02b47.js?adafb:49 [Violation] Forced
   reflow while executing
 * 02b47.js is a Litespeed cache combined file.
 * Are there more javascript files that I should exclude?

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [michielve](https://wordpress.org/support/users/michielve/)
 * (@michielve)
 * [5 years ago](https://wordpress.org/support/topic/unknown-error-35/#post-14358917)
 * Hi,
 * I don’t use any caching plugins but it looks like there are some more files you
   should exclude from caching. When I look at my own website with the plugin active,
   I see the following Javascript files:
 *     ```
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/popper.min.js?ver=20201204' id='popper-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/tippy/tippy-bundle.umd.min.js?ver=20201204' id='tippy-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/moment/moment-with-locales.min.js?ver=20201204' id='my_moment-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/moment/moment-timezone-with-data.min.js?ver=20201204' id='my_moment_timezone-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/fullcalendar4/core/main.min.js?ver=20201204' id='fullcalendar-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/fullcalendar4/moment/main.min.js?ver=20201204' id='fullcalendar_moment-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/fullcalendar4/moment-timezone/main.min.js?ver=20201204' id='fullcalendar_moment_timezone-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/fullcalendar4/daygrid/main.min.js?ver=20201204' id='fullcalendar_daygrid-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/fullcalendar4/timegrid/main.min.js?ver=20201204' id='fullcalendar_timegrid-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/fullcalendar4/list/main.min.js?ver=20201204' id='fullcalendar_list-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/lib/fullcalendar4/core/locales-all.min.js?ver=20201204' id='fullcalendar_locales-js'></script>
       <script type='text/javascript' src='https://blog.michielvaneerd.nl/wp-content/plugins/private-google-calendars/js/pgc.js?ver=20201204' id='pgc-js'></script>
       ```
   
 * I think you should exclude them all to be sure.
 *  Thread Starter [Argentum](https://wordpress.org/support/users/argentum/)
 * (@argentum)
 * [5 years ago](https://wordpress.org/support/topic/unknown-error-35/#post-14359071)
 * Thanks. Will try it.
 *  Thread Starter [Argentum](https://wordpress.org/support/users/argentum/)
 * (@argentum)
 * [5 years ago](https://wordpress.org/support/topic/unknown-error-35/#post-14362256)
 * Error is back. I’ll have to turn off javascript combine for the whole site.
 *  Thread Starter [Argentum](https://wordpress.org/support/users/argentum/)
 * (@argentum)
 * [5 years ago](https://wordpress.org/support/topic/unknown-error-35/#post-14366869)
 * Javascript combine if off but the error reoccurs.
 * TypeError: Cannot use ‘in’ operator to search for ‘error’ in -1
    at XMLHttpRequest.
   xhr.onload (pgc.js?ver=20201204:351) xhr.onload @ pgc.js?ver=20201204:377 in 
   xxx/wp-content/plugins/private-google-calendars/js/pgc.js

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Unknown error’ 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/)
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 * 4 replies
 * 2 participants
 * Last reply from: [Argentum](https://wordpress.org/support/users/argentum/)
 * Last activity: [5 years ago](https://wordpress.org/support/topic/unknown-error-35/#post-14366869)
 * Status: not resolved