It’s not a tactic, Epic wants your success. Game Engines are complicated and there are many parts in the chain, add in that they need to run on many configurations and versions and there will always be some issues, regardless of what game engine it is, or one you made yourself. Be patient.
When I am debugging packaging problems I try to take care of any warnings. I’ve found they are more than warnings. You are missing at least one file that it’s looking for.
Can’t find file ‘/Game/Metro_Station/Meshes/Vending_Machine’
That may just be a warning, or it could be causing your error.
From this line:
IO.IOException: The process cannot access the file WindowsNoEditor\MyProject.exe’ because it is being used by another process.
I’d wonder if you have 2 instances of the Editor open. Something is hanging on to it, either Visual Studio or something else. If it’s not obvious try restarting Windows.