Constant crashes in UE 4.19.1

I’ve recently upgraded my project from 4.17 to 4.19.1 and every other play (or PIE for that matter) I get a crash.

Here’s a log of a crash:

[2018.04.30-00.10.41:526][108]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2018.04.30-00.10.41:526][108]LogThreadingWindows: Error: Runnable thread RenderThread 12 crashed.
[2018.04.30-00.10.41:526][108]LogWindows: Error: === Critical error: ===
[2018.04.30-00.10.41:526][108]LogWindows: Error: 
[2018.04.30-00.10.41:526][108]LogWindows: Error: Assertion failed: (GIsCriticalError || !NumMarks) [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Core\Public\Misc/MemStack.h] [Line: 89] 
[2018.04.30-00.10.41:526][108]LogWindows: Error: 
[2018.04.30-00.10.41:526][108]LogWindows: Error: 
[2018.04.30-00.10.41:526][108]LogWindows: Error: 
[2018.04.30-00.10.41:526][108]LogWindows: Error: 
[2018.04.30-00.10.41:526][108]LogWindows: Error: Crash in runnable thread RenderThread 12
[2018.04.30-00.10.41:534][108]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2018.04.30-00.10.41:534][108]LogWindows: Error: HandleError re-entered.
[2018.04.30-00.10.41:534][108]LogWindows: FPlatformMisc::RequestExit(1)
[2018.04.30-00.10.41:534][108]Log file closed, 04/30/18 03:10:41

And here’s the log of another crash:

[2018.04.29-19.41.31:144][530]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2018.04.29-19.41.31:144][530]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2018.04.29-19.41.31:144][530]LogThreadingWindows: Error: Runnable thread RenderThread 13 crashed.
[2018.04.29-19.41.31:144][530]LogWindows: Error: === Critical error: ===
[2018.04.29-19.41.31:144][530]LogWindows: Error: 
[2018.04.29-19.41.31:144][530]LogWindows: Error: Fatal error: [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 819] 
[2018.04.29-19.41.31:144][530]LogWindows: Error: Rendering thread exception:
[2018.04.29-19.41.31:144][530]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xff29e2f8
[2018.04.29-19.41.31:144][530]LogWindows: Error: 
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x00000000685C8EDA UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x00000000685FF69B UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000006862025F UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000006861F094 UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x0000000068622313 UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x0000000068622649 UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x0000000067FE9BF4 UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x00000000685A5F21 UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x0000000068589DF4 UE4Editor-Renderer.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000006C57B713 UE4Editor-Core.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000006C57BD3A UE4Editor-Core.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000009BB63CC9 UE4Editor-RenderCore.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000009BB64CF6 UE4Editor-RenderCore.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000006C949FEC UE4Editor-Core.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x000000006C93ED53 UE4Editor-Core.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x00000000C6311FE4 KERNEL32.DLL!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x00000000C651F061 ntdll.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: [Callstack] 0x00000000C651F061 ntdll.dll!UnknownFunction []
[2018.04.29-19.41.31:144][530]LogWindows: Error: 
[2018.04.29-19.41.31:144][530]LogWindows: Error: 
[2018.04.29-19.41.31:144][530]LogWindows: Error: 
[2018.04.29-19.41.31:144][530]LogWindows: Error: 
[2018.04.29-19.41.31:144][530]LogWindows: Error: Crash in runnable thread RenderThread 13
[2018.04.29-19.41.31:150][530]LogWindows: Error: HandleError re-entered.
[2018.04.29-19.41.31:153][530]LogWindows: FPlatformMisc::RequestExit(1)
[2018.04.29-19.41.31:153][530]Log file closed, 04/29/18 22:41:31

Sometimes, it points to a bunch of Slate DLLs. It’s driving me crazy, it crashes every 5 minutes, constantly.

Any help would be greatly appreciated.

Here’s a pastebin after I installed the debug symbols: [2018.04.30-23.47.24:440][785]LogWindows: Error: === Critical error: ===[2018. - Pastebin.com