Hi there!
I’ve download the source code of UE5 early access. After building the engine from the source I was able to create UEEditor.exe which after running I’m successfully able to create a Blueprint based project. Till this point its fine.
However once I tried opening Up Valley of the Ancient Sample, it starts giving me errors like : 
And so you can’t open the sample project with the source build. Am I missing something or there is a way to open the project via Source build ?