Load Error: Cylinders and Reference to Gen Variables

I’m having an issue where cylinders aren’t appearing in my UE4 project. Every time I open it, I get the following errors:
Failed to load game/thirdpersonbp/vrtests/geo/cylinder.cylinder, which is referenced by Up_Gen_Variable, Forward_Gen_Variable, Right_Gen_Variable, and Cylinder. Additionally, the cylinder no longer appears in the basic shapes; where it should be, it just says “none”. I’ve tried going to “Show Engine Content” and “Fix Up Redirectors in Folder”, but nothing has worked. Please help!