i have the latest version of avast premium security and lately my avast cause some problem even to my laptop running windows 10 LTSC enterprise 64 bit!! sometimes cause blue screen popup,this message also appears:
I’ve had this problem too, and it seems to be related (in my case) to a problem with the firewall of this version that occasionally blocks the internet but also avast UI.
Sometimes the message is “UI failed to load” and sometimes “You are not logged in”.
Even though avast has given a fix, I’m not sure that this firewall redesign is - so far - fully worked out. :-
edit:I’ll try next time it happens to capture the “you’re not logged in” message. I haven’t seen it since I’ve been using avast.
It’s possible that the problem comes back randomly as for me (already 3 times since the update), the firewall service seems to have sometimes a delay in ignition and in this case prevents the UI from opening correctly.