Yes - here’s what I’ve got in the console. Before I updated to v2026.01, there weren’t any references to video-thumbnail or video-placeholder. There aren’t any videos at all anywhere on this dev instance.
Here’s the console:
Here’s the response headers:
edited to add: I created a new category and enabled Make new topics wikis by default. I was able to make a new topic in this category which was a wiki. However, I get the same error as before when i click on Remove Wiki for that post.