UnrealShaderWorkingDir file missing

Hi,
I want to make a landscape but it always crashes if I go to the landscape tab.

In the Output Log I get the error:

LogShaderCompilers: Warning: Could not create the shader compiler transfer file ‘C:/Users/745379/AppData/Local/Temp/UnrealShaderWorkingDir/4F2C29CE4FB98BFAAE65D5925A412863/021120DDB424CF88B2E6AE29516B58D3E’, retrying…

I think that I accidentally deleted the file UnrealShaderWorkingDir, but I don’t know how to reinstall them.

I already reinstalled UE 4.17.2 but it didn’t helped.

If you have any idea I would be happy to hear it.

Thanks for any help : D

I found a solution I needed to reinstall the Epic games launcher.