Hello,
When trying to access the page https://www.wikidata.org/wiki/Property_talk:P443, this error message is displayed instead of the page content:

[XlZN1wpAME0AAE0Y1dUAAABX] 2020-02-26 10:52:07: Fatal exception of type "InvalidArgumentException"

The page history works, but not the old versions of the page, so I can tell that the problem appeared between the last published version (00:25, 24 February 2020‎) and yesterday morning, when I first tried to access the page and got the error message.

All the other property talk pages I tried work fine, so it looks like the issue only affects this particular talk page.