C++ classes are disappearing in editor, but they are appearing in Visual Studio?!

[TuppsMidel]

I had the same issue. Solution from here worked for me.

My C++ classes disappear after reopening the project. Why?

I have created the actor MyEarth which loads a staticmesh from Content Directory and the class MyGameModeBase (derived from GameModeBase) which spawns an instance of MyEarth in a position. Everything works fine, the actor appears as expected. But,after saving eveything,when i reopen the project, my c++ classes MyEarth and MyGameModeBase are no longer in the C++Classes Folder of the Content Drawer of the Editor,and when i run the project,nothing appears and no MyEarth actor in the Outliner. Obv…