Since yesterday morning, it seems that pages in the Entry namespace (for my Tovasala Dictionary) beginning with S--uppercase or lowercase--cannot be created. (Wonder if other namespaces are affected as well?) This was first observed while trying to create one for saumdostar (to add up/sum up/calculate/enumerate/compute) through Page Forms, and now the same thing is happening (off-form) for SudGalige (the Republic of Ireland).
This contributor uses Chrome on a Galaxy Tab A to edit Miraheze. In both cases, Chrome outputs this browser-specific message:
This page isn't working
constantnoble.miraheze.org is currently unable to handle this request.
HTTP ERROR 500
I myself am not really sure what the problem is, but I reckon it might have begun when I introduced "Form:Entry/RFM" (imported from Referata RFM) yesterday, after a month of waiting out another outage from my former host.
On a related note: The Form namespace isn't configured to recognise subpages at the moment, at least on my wiki, and I don't want anything to break through ManageWiki or otherwise. See this November 2020 discussion with developer Yaron Koren, as well as this local namespace API overview.