VS Project Crash on Start up

hey guys, i added a subclass of my master weapons class in game, and during the next start up of the project Vs now gives me this error every time:

Assertion failed: Type == ENativeClassHierarchyNodeType::Folder [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.10\Engine\Source\Editor\ContentBrowser\Private\NativeClassHierarchy.cpp] [Line: 36]

… WTF is going on here ??
I didnt add any code into the file, and during the hot reload the editor crashed on me, and now the project wont start up :frowning: