It is interesting that your credentials work for SSH but not HTTPS.
To troubleshoot, use an SSH utility that allows you to capture your session output (ie putty.exe).
Use a command from the 'help debuggroup' CLI commands.
rkscli: support show
which will generate your support info file, and then display it to the terminal screen (that's why
you capture your output).
You'll probably then have to contact Tech Support for help analyzing the AP support info file to
try to understand if the webs process crashed, or...?