Crash when adding camera in sequence UE4-27

please help!

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Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000e64

UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_MovieSceneTools
UE4Editor_Sequencer
UE4Editor_Sequencer
UE4Editor_Sequencer
UE4Editor_Sequencer
UE4Editor_Sequencer
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
user32
user32
UE4Editor_ApplicationCore
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll