Sometimes, Unreal Engine projects will report the following errors when trying to load them despite a successful build:
” incompatible or missing module” OR
“The Following Modules are missing or built with a different engine version”
A confusing error sometimes because when you build inside Visual Studio you get build successful, and only encounter the error when trying to launch the editor.
If this is your case. This tutorial will help you fix it and also explain what is happening so that you can avoid it in the future.