I tried some workaround
first on windows in browser get url of raspberrysettings tab
entry this url in the field enter htpp/URL of the tab settings-reboot of max2/play
install new plugin AND THAT WORKS
After that several actions done upgrade Kernel,Upgrade Packages, new plugin for HifiBerry etc.
AND NOW EVERYTHING seems OK , the SQB server, the Hifiberry and even the Duet remote. No need for the receiver
BUT I still have one PROBLEM the OEPS error with the SSL HANDSHAKE