Hmm, I don’t think I’ve ever seen this exact error, but I’ve seen similar. Can you try this and report back:
- Close any open Unreal Editor
- Delete the contents of
{workspace}\Intermediate\PipInstall - Open the editor again
This will force the Unreal Editor to automatically re-run the pip installer. There’s a rare chance something failed to download last time it installed the python dependencies. One time I saw a similar issue and doing this clean and restart fixed it.
Let me know if you get unblocked or not! Either way is good info for me.
Good luck, and thanks for posting!