@starfish777 D'you understand English language? D'you catch what we're writing about? You're not helpful with the ejaculation - "I'm not using Vivaldi". Then use it for the hell at least once. It won't do you any harm or pain in your...
When you got Vivaldi installed you'd be presented with free WidevineCdm library in /opt/google directory. My Opera Dev uses it running in Debian Bullseye GNU/Linux. I use libffmpeg.so library from "herecura Repo" (find it yourself). Spotify works with Vivaldi for Debian, with Opera for Debian and what more, Vivaldi paid extra attention to the issue recently in this year.
Open Spotify in a common tab first, the hell. Only then go for the Sidebar goodies (aka Player). Do your homework using small steps and next time when you'd like to receive any helpful answer be kind to provide us with more information about your problems (what, where, why etc.).
You're damn unpleasant guy.