I understand that this isn’t designed for multisites, but how do I get this warning to stop appearing every single time I got to a Main WP page?
MainWP plugin is not designed nor fully tested on WordPress Multisite installations. Various features may not work properly. We highly recommend installing it on a single site installation!
That is strange. It’s designed to get dismissed forever once the X icon is clicked. Have you tried from a different browser? Could it be a problem caused by a conflict with some other plugin? If nothing helps, have you tried to simply hide it with a quick CSS snippet in the MainWP Custom Dashboard Extension?
I tried a different browser, same issue. Maybe ill set up a test install (with no plugins) to see what happens. I will try css for now. Are there any other relevant messages that css might also hide? Thanks.