Hello all. I am also getting 403 Forbidden error, using the latest plugin and mp3tag build for Windows. However the following tip is now working for me (got it via LLM), at least for the moment :
Open Genius#Lyrics.src on the %APPDATA%\Mp3tag\data\sources\
Add the following line:
[UserAgent]=1
UPDATE: Oops. It was a hasty conclusion. The tip overcomes the 403 error but the result is empty, exactly per descary0s comment. At least, I am able to open the actual Genius link but that's all. @bugzero By suggesting to use a proxy, did you mean the mp3tagproxy application from user The_Zhu?