I just installed Last Epoch for the first time.
When launching I experienced a consistent crashing on launch on what seemed to be authorization step. Log showed succesful login (!) but many “missing” lines so I tried graphic driver update. No luck there.
Lastly I tried shutting down all apps and antivirus software screens. It worked!
I was able to pin down the crash to a single setting in firewall:
“Filter loopback traffic (eg. 127.x.x.x ::1)”
It was a global setting, so it was overruling individual app setting. When I turned it off, I was finally able to access game screen.
Allow loopback traffic or it would crash on start.
Hope this would help someone else as well.