Hello, I made hundred of edits with Mass Edit Regex to delete obsolete templates on Nonciclopedia and while the operation was mostly successfull many pages still appear to be using those templates in Special:Whatlinkshere, so maybe the database needs to be refreshed?
Finally there's only a couple dozen pages left still resulting as using those templates, I can now check them personally and find out if MassEditRegex just happened to miss them. I believe the issue is solved, I just wonder if it will happen again when doing similar operations because I have to delete much more templates.
Today I mass removed another template, and 7 hourse later it still results used by lot of pages even after purging, for example these are the first 20 pages that are supposed to link Template:Vandalo but they don't: https://nonciclopedia.org/w/index.php?title=Speciale:PuntanoQui/Template:Vandalo&hideredirs=1&hidelinks=1&limit=20
There is a good chance it did not fix in general and the script may need run again if further issues. As for the bug that is preventing login, there is a global site notice active, that you can follow the steps listed there to resolve.