How to Fix mps-yt Errors
Mps-youtube is an open source software that allows you to play music, but recently there have been problems with this software. Such as...

Mps-youtube is an open source software that allows you to play music, but recently there have been problems with this software. Such as quota limit and daily limit errors or error fetching data. Here’s how to fix errors from mps-youtube.
Error Quota Limit
For this one, just change the api_key from mps-youtube, you can use the following command.
set api_key AIzaSyDUW0EydFaaXbfPgRPOgHFmmSeYAFi9xbY
Error Fetching Data
If you’ve changed the api_key but still can’t play music, you can update mps-youtube to the development version, because recently mpv has been updated and there are complications from there. Use the following command.
pip3 install --user -U git+https://github.com/mps-youtube/mps-youtube.git
Youtube said: invalid parameters
It turns out this is related to youtube-dl, please upgrade youtube-dl to the latest version using the following command.
pip3 install --user youtube-dl && pip3 install --user youtube-dl
--upgrade
Final Words
Please ask in the comments section if there are other errors with mps-youtube.
For now mps-youtube is no longer updated!