Unreal 5.4 problem with a packaged game! Server spawns the character and client disconnecting with 'Failed to load package' error.

Development Platform & Builds Debugging, Optimization, & Profiling
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Having the same problem. I upgraded from UE5.1 to UE5.4, wasn’t getting this issue before.

Network checksum mismatch. FullNetGUIDPath: [126]BP_PlayerState_C_2147481901.[134]AbilitySystemComponent

This is on an entirely new PC so I have no idea how there could be a mismatch… rebuilt and re-validated files. Hmm…