UE4 crashes when trying to open a level

I am trying to open a level and the editor keeps crashing, idk why it was working earlier but it isnt now for some reason. I have other levels open and am trying to open this level. Here is the errors i get:

MachineId:0AC8D1E240F0BD81B88F48B947046D14
EpicAccountId:2ec4f6339767411eb737de97405285c9

Unknown exception - code 00000001 (first/second chance not available)

"Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.9\Engine\Source\Editor\UnrealEd\Private\EditorServer.cpp] [Line: 1773]
//Game//HouseOfDemons//Level

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\misc\outputdevice.cpp:354]
UE4Editor_UnrealEd!UEditorEngine::CheckForWorldGCLeaks() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorserver.cpp:1773]
UE4Editor_UnrealEd!UEditorEngine::EditorDestroyWorld() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorserver.cpp:1903]
UE4Editor_UnrealEd!UEditorEngine::Map_Load() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorserver.cpp:2255]
UE4Editor_UnrealEd!UEditorEngine::HandleMapCommand() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorserver.cpp:5823]
UE4Editor_UnrealEd!UEditorEngine::Exec() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\editorserver.cpp:5317]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\unrealedsrv.cpp:743]
UE4Editor_UnrealEd!FEditorFileUtils::LoadMap() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\filehelpers.cpp:2014]
UE4Editor_UnrealEd!FEditorFileUtils::LoadMap'::8’::FLocal::HandleLevelsChosen() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\filehelpers.cpp:1880]
UE4Editor_UnrealEd!TBaseStaticDelegateInstance const & ptr64)>::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:921]
UE4Editor_UnrealEd!FEditorFileUtils::OpenLevelPickingDialog'::2’::FLocal::OnLevelsSelected() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\editor\unrealed\private\filehelpers.cpp:1661]
UE4Editor_UnrealEd!TBaseStaticDelegateInstance const & ptr64),TBaseDelegate const & ptr64> >::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:922]
UE4Editor_ContentBrowser!SAssetDialog::ChooseAssetsForOpen() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\editor\contentbrowser\private\sassetdialog.cpp:484]
UE4Editor_ContentBrowser!SAssetDialog::OnAssetsActivated() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\editor\contentbrowser\private\sassetdialog.cpp:401]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetDialog,0,TTypeWrapper cdecl(TArray const & ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetDialog,0,void cdecl(TArray const & ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_ContentBrowser!SAssetPicker::HandleAssetsActivated() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\editor\contentbrowser\private\sassetpicker.cpp:401]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetPicker,0,TTypeWrapper cdecl(TArray const & ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetPicker,0,void cdecl(TArray const & ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_ContentBrowser!SAssetView::OnListMouseButtonDoubleClick() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\editor\contentbrowser\private\sassetview.cpp:3287]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper cdecl(TSharedPtr)>::Execute() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void cdecl(TSharedPtr)>::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_ContentBrowser!TBaseDelegate >::ExecuteIfBound() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:482]
UE4Editor_ContentBrowser!SListView >::Private_OnItemDoubleClicked() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\slate\public\widgets\views\slistview.h:689]
UE4Editor_ContentBrowser!STableRow >::OnMouseButtonDoubleClick() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\slate\public\widgets\views\stablerow.h:261]
UE4Editor_Slate!::operator()() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4606]
UE4Editor_Slate!FEventRouter::Route >() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:214]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4607]
UE4Editor_Slate!FSlateApplication::OnMouseDoubleClick() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4587]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsapplication.cpp:1345]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsapplication.cpp:1708]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsapplication.cpp:706]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsapplication.cpp:628]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:884]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine
++depot+ue4-releases+4.9\engine\source\runtime\launch\private\launchengineloop.cpp:2392]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]

Hello,

This is a known issue, and was reported fixed in 4.10. Try upgrading your project to 4.10 and seeing if you are getting the same crash in your project.

Have a great day

Hi, thank you I will do so, Thank you for responding.