John,
When I remove the ethernet cable from my Raspberry pi I got this messages from the first and all following login attempt.
I also wait 20 minutes and got the same messages
Version 6.0.21.19
*** Starting to call SM0YOS-10
*** Opening serial port COM11; 9600 baud; Kenwood TH-D7/D72 A-Band
*** Connecting to SM0YOS-10
*** Connected to SM0YOS-10 at 2021-02-25 15:32:54
Error - CMS Not Available
*** Disconnected at 2021-02-25 15:33:02
*** Disconnect reported.
73
Thomas