Hi, I can’t reproduce this issue with UEFN, but we have seen this issue in UE before where it sometimes boils down to a corrupted file that’s used to communicate between the editor and the ShaderCompileWorker (SCW) instances. Does this issue reproduce 100% of the time for you or was it an intermittent issue?
I had this issue, but was able to get past it today when I realized my virus protection was the issue. I use PC Matic and it was blocking that executable from running without giving me the normal option to override. Once I turned that back on, I was able to tell it I trust that executable and it works fine. Maybe it’s at least an avenue to explore for others?