Hot reload stops project from compiling

[Gnimmel]

Just to add to this, I eventually realized the Compile button in the Unreal Editor works fine, so I was able to continue with my project.
I have...

[Gnimmel]

I recently updated my C++ project from UE4.25.4 to UE4.26.1 and now whenever I hit Build in Visual Studio (15.9.33) it wont hot reload most of the time....