Corrupted pak

Please help

LOG:
Fatal error: [File:Unknown] [Line: 3978]
Corrupted index in pak file (CRC mismatch).

0x00007ff807f14008 KERNELBASE.dll!UnknownFunction []
0x00007ff74fef7f99 FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff74fe9003b FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff74fe5bd68 FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff751240eb5 FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff75123ef61 FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff75123498c FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff751241797 FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff751241f8c FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff75123f147 FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff74ee2928e FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff74ee2b69e FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff74ee28b6a FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff74ee28dca FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff74ee304df FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff751b57a77 FortniteClient-Win64-Shipping.exe!UnknownFunction []
0x00007ff808ec1fe4 KERNEL32.DLL!UnknownFunction []
0x00007ff80ba4f061 ntdll.dll!UnknownFunction []
0x00007ff80ba4f061 ntdll.dll!UnknownFunction []

Hello,

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