I am getting an error when saving an edit on a specific page, but not on other pages. I am using wikitext2017 editor.

On this page: https://en.wikipedia.org/w/index.php?title=Wikipedia:Growth_Team_features

No matter what my edit is, I get this error:

The error code is ff45ee78-1ead-491a-b366-7c19420af4c1.

This happened in both Chrome Version 80.0.3987.149 and in Firefox 74.0.

@ppelberg is also experiencing this on the same page. @Catrope says it may be related to T249565: Wikidata's wb_items_per_site table has suddenly disappeared, creating DBQueryErrors on page views.