Hello,
this morning CB RA won’t offer me opening a connection to a remote machine, see frontend window:

Clicking reconnect won’t change anything. There are no proxies required nor set.
When looking into the log file, there seems to be an issue with “websocket”:
2019-08-05 10:06:09,718 [RA_SERVICE.4380] [23] NOTICE - Service reconnection attempt...
2019-08-05 10:06:09,719 [RA_SERVICE.4380] [23] NOTICE - Service SioState changed: ConnectionInProgress
2019-08-05 10:06:09,719 [RA_COMMON.4380] [23] NOTICE - SioService.SioCore.Connect to https://connect.ra.cloudberrylab.com:443
2019-08-05 10:06:10,219 [RA_SERVICE.4380] [19] NOTICE - Service SioState changed: Disconnected
2019-08-05 10:06:10,219 [RA_SERVICE.4380] [19] NOTICE - SioService.OnSocketError: Quobject.EngineIoClientDotNet.Client.EngineIOException: websocket error ---> System.Exception: HTTP/1.1 403 Forbidden
--- Ende der internen Ausnahmestapelüberwachung ---
and when trying to open https://connect.ra.cloudberrylab.com:443 manually in a browser it reports a SSL certificate error: Issuer unknown as well as expired certificate (2016-03-13):

I didn’t use CB RA for two days now, last Friday (2nd Aug 2019) this problem didn’t appear and RA worked smoothly.
Any hints?
Thanks
Philipp