Hello @F-Wer, there's two issues going on here. First, NTFS and Proton is known to be temperamental combination, and the 242760 and 1145360 logs hint that you've got broken wineprefixes with lines like err:file:init_redirects /media/ssd/Programs/Steam/steamapps/compatdata/1145360/pfx/dosdevices/c:/windows: No such file or directory. It's generally recommended to use a linux native filesystem with Proton.
Second, your system information and the 292030 log indicates that you do not have a sane Vulkan driver install with symbol lookup error: /overrides/lib/i386-linux-gnu/vulkan/libvulkan_radeon.so: undefined symbol: amdgpu_query_video_caps_info. This reads like it's similar to https://github.com/ValveSoftware/steam-runtime/issues/309#issuecomment-740989870 where something is going wrong with libdrm and there are missing symbols as a result.
Compatibility Report
System Information
I confirm:
Symptoms
I try to launch any Steam Play game and the window preparing to launch pops up and after a few seconds it closes.
Reproduction
Install ubuntu and the drivers add a NTFS drive and change way it's mounted according to the documentation.
My fstab file looks like this:
UUID=120AB19B0AB17C73 /media/ssd/ ntfs uid=1000,gid=1000,rw,user,exec,umask=000 0 0steam-242760.log
steam-292030.log
steam-1145360.log