Please tell me how to resolve this error message

Development Pipeline & Plugins Plugins
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1

enable the ONlineSubstytemLive plugin should fix it ,

once you open your proejct, open Plugin manager , search for this plugin and enable it .

2

252450-

github link : GitHub - feixuwu/TankFire: a unreal engine 4 3d multiplayer tank shoot .io game

I tried to download and run the github code, but there was an error
Can you help me? plz…