Editor crashes once I am trying to start a multiplayer game

Hello everyone, I used a fighting game plugin and I was getting the editor to crash every time I was starting a multiplayer game. So, here is the message:

Assertion failed: PIEInstanceID != INDEX_NONE [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LazyObjectPtr.cpp] [Line: 22]

Any Solutions?

P.S. This is in Unreal Engine 5

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