Migration from QNAP qpkg APP to Raspberry-PI (arm)

Hello,

Need to move my Plex install from my QNAP to a Raspberry-PI.

I have tried to follow different howtos:

https://support.plex.tv/hc/en-us/articles/201370363-Move-an-Install-to-Another-System

https://support.plex.tv/hc/en-us/articles/201154537-Move-Media-Content-to-a-New-Location

but with no success.

It always fails at the same point:

After the server has been installed and I connect to it the first time, it requests a Username and Password, which I enter and then it tries to connect to my QNAP Server. I have no option to “promote” that install to a Server.

Any ideas?

Thank you and regards,

Harald