Game keeps disconnecting after entering the Sanctum archives

The game keeps disconnecting(failed to load instance message appears) after I enter the Sanctum archives.
What I tried to resolve the issue:
1. Clearing the cache in appdata
2. verifying the integrity of game files
3. Changing the server also didn't work
4. Reinstalling the game

It semms that the issue is resolved now. Sanctum is playable again for me.