Does anyone know what this error stack cause is?

Development Rendering
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1

When i try to deploy on Android the materials of two of my static meshes revert to none and this error occures.

LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: === Critical error: ===
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error:
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: Assertion failed: Data != __null [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/OpenGLDrv/Public/OpenGLResources.h] [Line: 658]
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error:
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: [Callstack] 0x00000000B77B467C libUE4.so(0x000000000C20467C)!TOpenGLBuffer<FOpenGLBaseVertexBuffer, 34962u, &(CachedBindArrayBuffer(unsigned int))>::Lock(unsigned int, unsigned int, bool, bool)  []
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: [Callstack] 0x00000000B785772C libUE4.so(0x000000000C2A772C)![Unknown]()  []
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: [Callstack] 0x00000000B7856D78 libUE4.so(0x000000000C2A6D78)!FOpenGLDynamicRHI::LockVertexBuffer_BottomOfPipe(FRHICommandListImmediate&, FRHIVertexBuffer*, unsigned int, unsigned int, EResourceLockMode)  []
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: [Callstack] 0x00000000B389FA88 libUE4.so(0x00000000082EFA88)![Unknown]()  []
LogPlayLevel: Error:   03-05 00:22:24.145  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: [Callstack] 0x00000000B383CBD4 libUE4.so(0x000000000828CBD4)!FRHICommandListExecutor::ExecuteInner_DoExecute(FRHICommandListBase&)  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:145][  0]LogAndroid: Error: [Callstack] 0x00000000B389AE90 libUE4.so(0x00000000082EAE90)!FExecuteRHIThreadTask::DoTask(ENamedThreads::Type, TRefCountPtr<FGraphEvent> const&)  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000B389A550 libUE4.so(0x00000000082EA550)!TGraphTask<FExecuteRHIThreadTask>::ExecuteTask(TArray<FBaseGraphTask*, TSizedDefaultAllocator<32> >&, ENamedThreads::Type)  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000B20D1120 libUE4.so(0x0000000006B21120)!FNamedTaskThread::ProcessTasksNamedThread(int, bool)  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000B20CF658 libUE4.so(0x0000000006B1F658)!FNamedTaskThread::ProcessTasksUntilQuit(int)  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000B3927B60 libUE4.so(0x0000000008377B60)!FRHIThread::Run()  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000B21C5B08 libUE4.so(0x0000000006C15B08)!FRunnableThreadPThread::Run()  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000B20CA9D4 libUE4.so(0x0000000006B1A9D4)!FRunnableThreadPThread::_ThreadProc(void*)  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000E86C58F4 libc.so(0x00000000000808F4)![Unknown]()  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error: [Callstack] 0x00000000E867ED64 libc.so(0x0000000000039D64)![Unknown]()  []
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error:
LogPlayLevel: Error:   03-05 00:22:24.146  8576  8691 D UE4     : [2021.03.04-15.22.24:146][  0]LogAndroid: Error:

Thoughts appreciated.

2

Hello, I´m having the same issue recently I update my project to ue5.1 and my game crashes. Could you tell me if you could Fix the error. Thanks in advance.