While in play, its just closed off. Is this something from the launcher or is this my PC?
You didn’t give much information, but I would just try verifying your game files first
What were you doing at the time?
If it happens again could you post your log file? Which you can get following this tutorial: https://support.lastepoch.com/hc/en-us/articles/1260805192629-The-Game-s-Log-File