Steps to replicate the issue (include links if applicable):
What happens?:
When trying to use the translation tool to translate an article from certain Wikipedias, there's often an error message in a red box on top which says "Critical error: Content translation failed to load due to internal error", or its equivalent in other languages. Furthermore, the content of the original article does not load. This happened in the last few days to another user, and today I've noticed it as well. Somehow this didn't happen when I tried to test the translation tool from frwiki to enwiki, or even one time from arwiki to arywiki. Basically the problem appears more or less at random, but more frequently in recent times.
What should have happened instead?:
Normally the article in the source language simply loads and I begin translating.
Software version (skip for WMF-hosted wikis like Wikipedia):
N/A
Other information (browser name/version, screenshots, etc.):
I'm using Google Chrome v 119.0.6045.160 (64 bits). Sreenshots