Can't package my Game and Editor crashes when opening a certain level

I’ve read through a few posts of people that are having problems with something similar. My problem is that i just don’t know what to search for.
At some point i deleted 3 Materials i didnt use anymore and i also deleted a Level i didnt need anymore. Not sure if that might have caused this. Some time after that i couldn’t open up my level anymore because the editor crashes. When i try to package it, it just stops.

This is the error message i get when trying to package:

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: begin: stack for UAT
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: === Critical error: ===
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: Fatal error!
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000008
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2b02c181 UE4Editor-Landscape.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2afa7263 UE4Editor-Landscape.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2afa1aa2 UE4Editor-Landscape.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2afa18a4 UE4Editor-Landscape.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2b9c3345 UE4Editor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: begin: stack for UAT
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2baab781 UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2bac62a4 UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa2bac5499 UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff9f9b60b3c UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff9f9ba553d UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff9f9a17a8d UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff9f9a488ff UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff74d10e9c2 UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: === Critical error: ===
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff74d105968 UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: Fatal error!
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff74d105bba UE4Editor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff74d113dac UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000008
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff74d114ce6 UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa2b02c181 UE4Editor-Landscape.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa51ad3034 KERNEL32.DLL!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffa526d1431 ntdll.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: end: stack for UAT
PackagingResults: Error: [Callstack] 0x00007ffa2afa7263 UE4Editor-Landscape.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa2afa1aa2 UE4Editor-Landscape.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa2afa18a4 UE4Editor-Landscape.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa2b9c3345 UE4Editor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa2baab781 UE4Editor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa2bac62a4 UE4Editor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa2bac5499 UE4Editor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff9f9b60b3c UE4Editor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff9f9ba553d UE4Editor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff9f9a17a8d UE4Editor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff9f9a488ff UE4Editor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff74d10e9c2 UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff74d105968 UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff74d105bba UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff74d113dac UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff74d114ce6 UE4Editor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa51ad3034 KERNEL32.DLL!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffa526d1431 ntdll.dll!UnknownFunction []a

This is the error i get when the Editor crashes because i try to open the level:

[2018.09.08-09.31.51:841][572]LogWindows: Error: === Critical error: ===
[2018.09.08-09.31.51:841][572]LogWindows: Error:
[2018.09.08-09.31.51:841][572]LogWindows: Error: Fatal error!
[2018.09.08-09.31.51:841][572]LogWindows: Error:
[2018.09.08-09.31.51:841][572]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000008
[2018.09.08-09.31.51:841][572]LogWindows: Error:
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ffa0289c181 UE4Editor-Landscape.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ffa02817263 UE4Editor-Landscape.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ffa02811aa2 UE4Editor-Landscape.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ffa028118a4 UE4Editor-Landscape.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9ffd73345 UE4Editor-CoreUObject.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9ffe5b781 UE4Editor-CoreUObject.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9ffe762a4 UE4Editor-CoreUObject.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9ffe75499 UE4Editor-CoreUObject.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f939c378 UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f938c815 UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f936f4a5 UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f9c4da23 UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f9732f1c UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f9725798 UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f970e96d UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f973804e UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9f970e9ef UE4Editor-UnrealEd.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9e89b555b UE4Editor-ContentBrowser.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9e8961c3f UE4Editor-ContentBrowser.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9fd279c3b UE4Editor-Slate.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9fd0694c5 UE4Editor-Slate.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9fd101db2 UE4Editor-Slate.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9fd0e7c7a UE4Editor-Slate.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ff9fd0db25c UE4Editor-Slate.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ffa423fd1c7 UE4Editor-ApplicationCore.dll!UnknownFunction []
[2018.09.08-09.31.51:841][572]LogWindows: Error: [Callstack] 0x00007ffa423f0270 UE4Editor-ApplicationCore.dll!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ffa423ff4c5 UE4Editor-ApplicationCore.dll!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ffa423ec209 UE4Editor-ApplicationCore.dll!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ffa51d16cc1 USER32.dll!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ffa51d16693 USER32.dll!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ffa42400646 UE4Editor-ApplicationCore.dll!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ff6f10554e5 UE4Editor.exe!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ff6f1065b3c UE4Editor.exe!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ff6f1065bba UE4Editor.exe!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ff6f1073dac UE4Editor.exe!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ff6f1075aaa UE4Editor.exe!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ffa51ad3034 KERNEL32.DLL!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error: [Callstack] 0x00007ffa526d1431 ntdll.dll!UnknownFunction []
[2018.09.08-09.31.51:842][572]LogWindows: Error:
[2018.09.08-09.31.51:854][572]LogExit: Executing StaticShutdownAfterError
[2018.09.08-09.31.51:860][572]LogWindows: FPlatformMisc::RequestExit(1)
[2018.09.08-09.31.51:865][572]Log file closed, 09/08/18 11:31:51