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4.25.3 Assertion failed: Pair != nullptr error

Hi, please help me.

I run into this error when try to launch my project on android phone from editor. No idea where to start search the problem.
I deleted all folder except content from project, not helped.
No problem with example (Top down) project, can run on my phone.

When i package to apk and isntall to phone, do not get any error, but my app instant close after unreal logo.


LogPlayLevel: 10-05 12:20:41.482 5817 5849 D UE4 : Assertion failed: Pair != nullptr [File:D:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/Core/Public\Containers/Map.h] [Line: 584]
LogPlayLevel: 10-05 12:20:41.482 5817 5849 D UE4 :
LogPlayLevel: 10-05 12:20:41.491 5817 5849 D UE4 : [2020.10.05-10.20.41:491] 0]Assertion failed: Pair != nullptr [File:D:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/Core/Public\Containers/Map.h] [Line: 584]
LogPlayLevel: 10-05 12:20:41.492 5817 5849 D UE4 :
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: === Critical error: ===
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error:
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: Assertion failed: Pair != nullptr [File:D:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/Core/Public\Containers/Map.h] [Line: 584]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error:
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C3184A08 libUE4.so(0x00000000094BAA08)![Unknown]() ]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C31846B4 libUE4.so(0x00000000094BA6B4)!UDataTable::LoadStructData(FStructuredArchiveSlot) ]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C3185490 libUE4.so(0x00000000094BB490)!UDataTable::Serialize(FStructuredArchiveRecord) ]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C3F330C8 libUE4.so(0x000000000A2690C8)!UDataTable::Serialize(FArchive&) ]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C00F4DD8 libUE4.so(0x000000000642ADD8)!FAsyncPackage::EventDrivenSerializeExport(int) ]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C00EF144 libUE4.so(0x0000000006425144)!FAsyncPackage::ProcessImportsAndExports_Event() ]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C00EE910 libUE4.so(0x0000000006424910)!FAsyncPackage::Event_ProcessImportsAndExports() ]
LogPlayLevel: Error: 10-05 12:20:41.492 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C00FC0E4 libUE4.so(0x00000000064320E4)!FAsyncLoadingThread::ProcessAsyncLoading(int&, bool, bool, float, FFlushTree*) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:492] 0]LogAndroid: Error: [Callstack] 0x00000000C0105898 libUE4.so(0x000000000643B898)!FAsyncLoadingThread::TickAsyncThread(bool, bool, float, bool&, FFlushTree*) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000C01049EC libUE4.so(0x000000000643A9EC)!FAsyncLoadingThread::TickAsyncLoading(bool, bool, float, FFlushTree*) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000C01152CC libUE4.so(0x000000000644B2CC)!FAsyncLoadingThread::FlushLoading(int) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000C03A6EB0 libUE4.so(0x00000000066DCEB0)!LoadPackageInternal(UPackage*, char16_t const*, unsigned int, FLinkerLoad*, FArchive*, FUObjectSerializeContext*) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000C03A4C80 libUE4.so(0x00000000066DAC80)!LoadPackage(UPackage*, char16_t const*, unsigned int, FArchive*, FUObjectSerializeContext*) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000C3CF8FDC libUE4.so(0x000000000A02EFDC)!UEngine::LoadMap(FWorldContext&, FURL, UPendingNetGame*, FString&) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000C3CF52D0 libUE4.so(0x000000000A02B2D0)!UEngine::Browse(FWorldContext&, FURL, FString&) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000C32B7F80 libUE4.so(0x00000000095EDF80)!UGameInstance::StartGameInstance() ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000BEDB20A8 libUE4.so(0x00000000050E80A8)!FEngineLoop::Init() ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000BEDB0FF4 libUE4.so(0x00000000050E6FF4)!AndroidMain(android_app*) ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000BEDC09CC libUE4.so(0x00000000050F69CC)!android_main() ]
LogPlayLevel: Error: 10-05 12:20:41.493 5817 5849 D UE4 : [2020.10.05-10.20.41:493] 0]LogAndroid: Error: [Callstack] 0x00000000BEDEFAD8 libUE4.so(0x0000000005125AD8)![Unknown]() ]
LogPlayLevel: Error: 10-05 12:20:41.494 5817 5849 D UE4 : [2020.10.05-10.20.41:494] 0]LogAndroid: Error: [Callstack] 0x00000000E8FA489A libc.so(0x000000000006489A)![Unknown]() ]
LogPlayLevel: Error: 10-05 12:20:41.494 5817 5849 D UE4 : [2020.10.05-10.20.41:494] 0]LogAndroid: Error: [Callstack] 0x00000000E8F5E32A libc.so(0x000000000001E32A)![Unknown]() ]