Yesterday I updated my iMac 2019 with the new Catalina MacOs and the problems with connected Apple Music and Apple Store started. I uninstalled and reinstalled KIS20 but the problem persists. Tonight when I return home I check the status of the option "Check secure connections (HTTPS) for Safe Money and Private browsing". The same problem I already had last week with an iMac 2009 (High Sierra) and iTunes and also on this computer I will check the status of "Check ...".
Regards.