Hi, yes I had the same problem. Nothing helped, again nothing! I had to reinstall the whole system (format system disk) then after clean install 4.26.1 working well. And trust me, I tried everything that I find on the internet. What I mean:
- update - ShaderCompiler.cpp
- update - r.XGEShaderCompile = 0 (ConsoleVariables.ini)
- Uninstall EpicLauncher and again install - delete all data
- Update EpicLauncher, Windows, graphic drivers