Hi @Peter_Aschinger We have confirmed that the latest version of Music Station 5.4.6 may appears to be causing login failures. We are currently arranging to rollback to version 5.4.4 while we investigate the root cause.
Could you try manually install the previous version Music Station 5.4.4 using the link below to see if it resolves the connection issue? The version 5.4.4 works normally in our quick test.
https://download.qnap.com/QPKG/MusicStation_5.4.4_20250704.zip
Thanks for bringing this to our attention, and sorry for the inconvenience caused.