Fatal Error Crash

I have this issue where after a quest is completed the game just crashed and from my testing it is dependant on where you are stood in game and if a certain section is visible on your screen.

Disclaimer (This was a group project and the programmer who coded the game in both C++ and Blueprints is no longer available to fix the issue due to having a full time job. Hence why I am asking for help) I would apricate if I could get help by screen sharing via discord so I can show the crash/output logs as well as showing when the game crashes too.

Try to post the log here, we will try to guide you on how to debug it.

My guess would be first it could be some heavy vfx that get rendered on screen, try to remove that actor causing that crash to check if it really the culprit.