I Had a similar issue, not specifically with that game but on another (SWTOR), other games were working fine but it would drop me back to the pop-OS log in screen.
Your issue may be different but after much testing & asking a friend to load the same settings I had onto one of their machines, with them getting it to work, I started to look at what was different between our machines.
What I found was causing it was having a CPU with onboard graphics & a D-GPU running at the same time (this was possible in Windows using Lucid Logics Virtu software but apparently not Linux). It was an easy fix in bios to set the D-GPU to on & the onboard graphics to off, once I did the game performed as expected & no more crashes to Pop-OS log in screen at loading.
If you have a CPU with onboard graphics, that may be your answer.