NextCloud: Error occurred while checking server setup

deleting content since no help was received. Don’t want other people to click into this thread and see no answers.

That message comes up if there’s a problem running the checks. Specifically, if something happens when accessing https://yourdomain.tld/settings/ajax/checksetup.

These checks are ran from the client-side.

Check your browser console under the Network tab. Find (or filter by) the entry for checksetup (note: not setupchecks.js which is the precursor). The error you’re seeing comes up if your server doesn’t give back a 200 HTTP code.