Unreal Crashes after loading screen

basically my unreal keeps crashing every time i try to load up a project, it loads to 100% and then just crashes, this has been happening ever since i bugged out my material editor.
here is the error report i always get

achineId:09716FD96A4E8DC25F058EA012C8C2A7
EpicAccountId:ea2a198d4fd94636a7bdb4d5ed16748a

SEGV_MAPERR at 0x3

FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x101cb831b (filename not found) [in UE4Editor-Core.dylib]
FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x101e49ee6 (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::Logf(wchar_t const*, …) Address = 0x101f3e6f7 (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, …) Address = 0x101f0c9c4 (filename not found) [in UE4Editor-Core.dylib]
FTabManager::RestoreFrom(TSharedRef const&, TSharedPtr const&, bool) Address = 0x108770da9 (filename not found) [in UE4Editor-Slate.dylib]
FMainFrameModule::CreateDefaultMainFrame(bool) Address = 0x10bfb6b50 (filename not found) [in UE4Editor-MainFrame.dylib]
EditorInit(IEngineLoop&) Address = 0x10a907ffa (filename not found) [in UE4Editor-UnrealEd.dylib]
GuardedMain(wchar_t const*) Address = 0x101bf77ff (filename not found) [in UE4Editor]
-[UE4AppDelegate runGameThread:] Address = 0x101c078fc (filename not found) [in UE4Editor]
-[FCocoaGameThread main] Address = 0x101e21746 (filename not found) [in UE4Editor-Core.dylib]
NSThread__main Address = 0x7fff8917de92 (filename not found) [in Foundation]
_pthread_body Address = 0x7fff8734b05a (filename not found) [in libsystem_pthread.dylib]
_pthread_body Address = 0x7fff8734afd7 (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fff873483ed (filename not found) [in libsystem_pthread.dylib]

some one please help, i tried uninstalling and reinstalling multiple times with no progress

Not for sure how much help I will be, but…

  1. Can you fall back to version 4.10 and see if that will open?
  2. What did you do to “bug out” the material editor?
  3. Were you working on some particular file that you may have deleted? The reason I ask, is there is an assertion failed, from the tabmanager (which that should be the slate subsystem) and from the name of the tabmanager routine it appears the code is trying to restore something, and I also note that Cocoa is in the call chain. As well as a file name not found.

As you have tried to uninstall and re-install, and the tabmanager is using a routine called “restorefrom”, it would seem that the uninstall is not cleaning everything up, and UE4 is finding something left laying around, that is causing it to go down the same path.

Does this occur with all projects?

.