I am sorry – I posted about the fix too soon. There were some more adoptions to the installer needed to make sure it works correctly.
I fixed some usability issues in the webinterface and made sure that the needed package sources are added correctly before installation of squeezebox server and also added the DSD-Player binary that was missing in the last version.
If you now choose the current Max2Play Image and update the webinterface to the latest version (Beta or 2.58) you should be able to install the Squeezebox server correctly.
Please report if you find any remaining bugs and thanks for your patience!
All the Best