That error code is generic, but since you are crashing specifically on Standoff, it usually points to a bad texture or an overlay conflict.
Try these fixes first:
Disable Overlays: Turn off the Discord Overlay, MSI Afterburner, or any recording software. These often cause crashes when the round changes in S&D.
Remove Custom Textures: If you have installed any custom camos or map textures, delete them (or rename your t6r/data/images folder) to test. A corrupted texture on a specific gun or map object will crash the game instantly when it loads.
If that doesn't work, you should upload that crash dump file you found (plutonium-r5214...) to the #support channel in the Plutonium Discord. The bot there can read the file and tell you the exact cause