Run Out of Memory When Changing Levels

I don’t actually have crash report, I had crash context

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	<CrashGUID>UE4CC-Windows-9E5213544ECCE1A8AD548399FE377E43_0000</CrashGUID>
	<ProcessId>8740</ProcessId>
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	<IsSourceDistribution>false</IsSourceDistribution>
	<IsEnsure>false</IsEnsure>
	<IsAssert>true</IsAssert>
	<CrashType>Assert</CrashType>
	<SecondsSinceStart>3400</SecondsSinceStart>
	<GameName>UE4-Hyperbation</GameName>
	<ExecutableName>UE4Editor</ExecutableName>
	<BuildConfiguration>Development</BuildConfiguration>
	<GameSessionID />
	<PlatformName>Windows</PlatformName>
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	<EngineModeEx>Dirty</EngineModeEx>
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	<CommandLine>&quot;D:\Epic Games\Unreal Projects\Hyperbation\Hyperbation.uproject&quot;</CommandLine>
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	<UserName>qiangjiadong</UserName>
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	<ErrorMessage>Fatal error: [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformMemory.cpp] [Line: 183] Ran out of memory allocating 4177920 bytes with alignment 0</ErrorMessage>
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	<MemoryStats.OOMAllocationSize>4177920</MemoryStats.OOMAllocationSize>
	<MemoryStats.OOMAllocationAlignment>0</MemoryStats.OOMAllocationAlignment>
	<TimeOfCrash>636619895592700000</TimeOfCrash>
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	<PlatformFullName>Win64 [Windows 10  64b]</PlatformFullName>
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I just tried to play inside viewport and then it crashed all the time.

Pls help!

Hello,

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https://epicsupport.force.com/unrealengine/s/

Thanks