Server problem?

Hi, I keep getting this recently whilst running SC (see screenshot), can someone tell me what’s happening, and what I need to do to stop it? I’ve seen several threads on Git addressing this, and elsewhere, but it’s only started happening more recently on mine - I’m on SC 3.11.1.

BTW, it happens even when I’m not doing something.


Thanks in advance - Joesh

p.s. Forgot to say I’m on MacOs 10.13.6