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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i’d need to see actual log files in order to see actually thing, but one thing i know that is (for some reason) still an issue is handshake mismatching, workaround is to add this to your DefaultEngine.ini and then report back:

[ConsoleVariables]
net.CurrentHandshakeVersion=2
net.MinHandshakeVersion=2

if that works, let me know. if not i’d need to see logs to try to get the full picture. for context i went from 5.0 to 5.4 and had to do that.