Feb 7 2021
In https://es.nocyclo.tk/wiki/ there is also the same problem. The namespace "Plantilla:" for some reason changed to "Template:".
Feb 1 2021
I think the bug has been fixed. Disable the "Display Title" extension and most of the links with the problem were fixed.
Enabled extensions appear here. I've been checking the extensions and I still can't find the extension that produces the fault.