Language Reactor – "Failed to fetch translations" on YouTube

Hi everyone,
is anyone else experiencing issues with Language Reactor in Chrome on macOS?
On YouTube, translations do not load and I always see this error:

Failed to fetch translations. Wait and try again.

I tried reinstalling the extension and resetting Chrome, but the problem still exists.
Any ideas?

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Same here.
I almost kill myself to fix it!

Same here. I couldnt find any solution

Yes, I get the error on every video now. Even though the extension is working fine.

I have had the same issue on Youtube studying simplified Chinese for some days. Perhaps even a week, but I’m not sure on that. Regardless, LR worked previously. The error is not too consistent, as it pops up with some videos, but not all. Also, now with one video [ “Copycatting in China ‪@xiaoguachinese‬ | Comprehensible input Chinese | Intermediate” by Lazy Chinese ], repeatedly refreshing the browser makes the translations load sometimes and fail sometimes. Additional details are that I’m on Windows 10, Chrome 139.0.7258.155, and LR 5.1.4.

Still having persistent problems with this (18 October 2025) on Win10 and Win11. I noticed that translations work fine in videos from the YouTube catalogue on the Language Reactor webpage but when you click on play in YouTube you get the same error message appearing (Failed to fetch translations. Wait and try again.) and the translation fails to appear.