Hi. We have a WordPress multi-site. I last accessed the sites on Wednesday and I ran a WordPress update yesterday. Now, four of the five site we use gave us an error message that said the following:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator and inform them of the time the error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
We were unable to even access the four sites that gave us that message. We had our hosting site try to find the issue and they found a detailed error message, which shows:
Warning: extract() expects parameter 1 to be array, boolean given in /home/content/06/11990506/html/wp-content/plugins/wp-category-posts-list-ERROR/classes/loader.php on line 61
Warning: Cannot modify header information - headers already sent by (output started at /home/content/06/11990506/html/wp-content/plugins/wp-category-posts-list-ERROR/classes/loader.php:61) in /home/content/06/11990506/html/wp-includes/pluggable.php on line 1171
This tells us that the wp-category-posts-list-ERROR plugin is the cause errors on the sites.I am unsure of what this plug-in does and how to remove it, especially since we cannot access the sites.
Has anyone experienced this issue and know how to remedy the problem?