My project is also only using Blueprints. But, (unless there’s another way) if you really want to use the plugins, all you need to do is go under File -> Add Code to Project -> Next -> Create Class. Then open it in Visual Studio and click Build. When it’s done you shouldn’t have to ever touch C++ / VS again. Doing this allowed me to use the plugins for a Blueprint-only based project after I had the same error.