Eh, I deserve to get bonked... I had my suspicion when it acted the same on Windows 10, then it hit me that Creation Kit is installed in the same folder as Skyrim. Lo and behold, once Skyrim was installed, it loaded without issues. Oh well, time to test the functionality.
I'll close the issue for now and reopen if I find anything useful.
steam_api.dllx1 2021-09
Compatibility Report
System Information
I confirm:
Symptoms
Immediately stops after starting, e.g nothing is shown on screen.
Looking at the log, an exception is raised early on
60767.971:00cc:00d0:trace:seh:dispatch_exception code=6ba flags=0 addr=000000007B01236E ip=000000007B01236E tid=00d0 60767.971:00cc:00d0:warn:seh:dispatch_exception unknown exception (code=6ba) raisedand it seems unable to find the steam_api.dll file
60768.311:010c:0110:err:module:import_dll Library steam_api.dll (which is needed by L"Z:\\home\\fureloka\\.local\\share\\Steam\\steamapps\\common\\skyrim\\CreationKit.exe") not found 60768.448:010c:0110:err:module:LdrInitializeThunk Importing dlls for L"Z:\\home\\fureloka\\.local\\share\\Steam\\steamapps\\common\\skyrim\\CreationKit.exe" failed, status c0000135Reproduction