Cant open project. Crash at 93%

Hello!

I have a problem with my project. Now it’s crashing at 93%

Before crash:
Delete all light at scene
Copy paste new light setup in project (from poligonacademy)
Rebuild lights
It works ok before saving

When I try to save it I see error message about some textures and all was closed.
After that I cant open project, it was crashed at 45%

What already tryed:
Delete content folders. Find that problen in 1 textures subfolder and ThirdPersonCharacter (in *ThirdPersonBP\Blueprints)
Delete damaged textures. Open and save new 3rd person project. Copy BP to old project.
Now I can open it, i have my content, but level is default 3rd person, no one my mesh in there.

How can I fix it? Have any solution to open my level with all my mashen on their places? It was too sad if now, 3 weeks of work just…

Error messege:

LoginId:854627044b34ba7cbc91c4a5aee0d593
EpicAccountId:37e261f8f5b64240b0e42996fc087a8c

Assertion failed: [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp] [Line: 3715] Brush /Game/ThirdPersonBP/Maps/ThirdPersonExampleMap.ThirdPersonExampleMap:PersistentLevel.BoxBrush270: Serial size mismatch: Got 1720, Expected 304

UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll

i have the same problem…my game didnt open this morning…i got the same crash report =(

Hello,

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Thanks