I'm also having this problem and have been a Pandora user for years.
The problem is on my Chrome browser (latest version 105.0.5195.125 which I don't think is related). I kept getting an error about the password being incorrect, so I reset the password and it still didn't work. I deleted all the cookies, didn't work. I stopped the adblocker, ghostery & privacy badge (It works fine on other sites), but it still didn't work. The "return" key doesn't seem to work, but I don't know if this is a functional design flaw. I also tried login on from privacy mode with chrome, nope, not working.
I finally used Firefox and the password magically worked. So this is a Chrome specific issue. I have a Mac Monterey 12.6
... View more