I have done almost all of the points listed but failed to resolve. The only two things I haven’t been able to do are clear the cache and copy the site to staging. For cache cleaning I have no plugins, settings in Worpress or options in hosting to run it. And the hosting plan I’m working on doesn’t even have the possibility of staging, however I have backed up the site and the database, so you can safely log in with the credentials that I leave you in the safe note below. If it can serve you as information, I specify that before the map worked and in addition I find the same error with another site that always has Pro but with different hosting and different setting.
Thanks and good job