Does anyone know what could cause this error and how to fix it?
Cookie names cannot contain any of the following '=,; \t\r\n\013\014' in public_html/wp-content/plugins/membermouse/includes/init.php(220) : eval()'d code on line 107
My "error_log" is full of these messages. Some of my users report 500 internal server errors, and it might be caused by this.
A number of PHP warnings will show up from time to time as both the WordPress environment and the MM plugin continue to evolve. You can usually ignore warnings as they do not affect the functionality or performance of your site significantly (and are usually due to backwards compatibility coding included with the plugins for those on older environments). As long as your specs meet those outlined in the following article, you can operate the memberMouse plugin without issue: https://support.membermouse.com/support/solutions/articles/9000020248-wordpress-hosting-providers