Solution: remove Timeless from the Skip Skins ($wgSkipSkins) list

In T9436#191116, @Universal_Omega wrote:

I'm guessing the overall cause is wgSkipSkins being set, but that is intended to support most skins being set there, so not sure why it would happen.

fixed it - we had "Timeless" on our skip list
and there was apparently no way to get the page to accept a different skin than that.

it was (that was my original idea as well btw.)
now as it said "Timeless" I thought - this would do.
changed it to "Vector-2022" now, same error

I (or one of you) can disable all the extensions at will - the site is private anyway and with the removed Pivot skin needs a major revamp.

I personally find "It is unmaintained" simply false given that after the initial ticket for it a patch was submitted within 3 days.
I hope once it is merged into the trunk again, this ticket will re-evaluated and we can keep our favorite theme for a while still.