Could not play song, no player detected

[GD-Dal]

According to this I should be able to play songs if I have Spotify openend on my (Windows) desktop.
I have that, but I still get the message that no player is detected.
I have tried to open your_spotify in 2 different browsers.
Am I missing something?

Thanks

[Yooooomi]

Hello! This is weird. Do you have a premium account?

[GD-Dal]

Hi.
Yes I have a premium account

[Yooooomi]

Does it output anything backend? Any error?
Just checked and it works on my end.
Do you have the official desktop Spotify application? Is it up to date? Is it the Microsoft store one?
I honestly have no clue at this point, I'm trying to find something that differs from me.

[GD-Dal]

I can see this in the docker log:
POST /spotify/play 400 164.294 ms - 100

Yes, It is the official Spotify application. Not the one from Microsoft Store, though