WindowsPMP + EmbeddedOS on one PC?



My Client-Pc has two drives.
On the first I installed Windows+Plex mediaplayer which I connected to my Plex-account. ->Works.
On the second drive I installed the EmbeddedOS. I can't connect it to my account. Every time I enter the 4-digit code online I get an error message...

Isn't it possible to connect two players on one device?
Can it be that one PC can only connect one time with the account?

Thank you!
Kind regards, Martin


When I enter the 4 digits to connect the client to my account: