ShooterGame crashes after match

Hi,
I built a fresh copy of ShooterGame and tested on my PC. The game runs fine but when the match is over (Team DM) it shows the scores then goes to loading screen and never go any further. It then crashes and present me with this error:


MachineId:C66AEC814506E4A17FAB35B555729861
EpicAccountId:241d646eb8a848239f1b3ae786c86ec3

Access violation - code c0000005 (first/second chance not available)

""

UE4Editor_Engine!AGameState::SeamlessTravelTransitionCheckpoint() [c:\ue4.10\engine\source\runtime\engine\private\gamestate.cpp:128]
UE4Editor_Engine!FSeamlessTravelHandler::Tick() [c:\ue4.10\engine\source\runtime\engine\private\world.cpp:4672]
UE4Editor_Engine!UEngine::TickWorldTravel() [c:\ue4.10\engine\source\runtime\engine\private\unrealengine.cpp:8816]
UE4Editor_Engine!UGameEngine::Tick() [c:\ue4.10\engine\source\runtime\engine\private\gameengine.cpp:914]
UE4Editor!FEngineLoop::Tick() [c:\ue4.10\engine\source\runtime\launch\private\launchengineloop.cpp:2427]
UE4Editor!GuardedMain() [c:\ue4.10\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [c:\ue4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [c:\ue4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]


Any ideas?