Steam version does not start

A friend of mine can't start poe1 via steam but runs it fine on the standalone launcher. When he opens it with steam it starts and almost immediately stops, I'm out of ideas and I'd like some help

Got the same problem this morning. Game updated and crashes before it even shows the GGG logo. Was fine yesterday before update.

Update: Verifing the game files fixed it for me.

Had the same issue. Game log indicates some packed DirectX12 shader cache files are missing. I had only files 65-70. Verifying on Steam indeed solves the issue.

Some clarification on what this changes would be nice. Does the game no longer generate shader cache files in the location we designate in the production.ini file? Can we choose between pre-built and our own shader cache?

Steam has a way for games to provide pre-built shader cache btw. It can also be toggled in Steam settings. I don't think it's used here because I have that disabled.

im having the same issue but with poe2 does anyone know a fix