Can not sign it, This browser or app may not be secure

[rovingrambler]

This is a fresh Debian testing installation.

[wisplite]

it doesn't really matter.
The musixmatch integration doesn't work either.

[medisoft]

Same here. It should be a way to copy the authentication link to paste into chrome and authorize there, or use application password

[iBillyO]

Same. Been using this for over a year and loved it, but just did a clean install of windows and now I can't sign back in to YTMD.