Parallel upstream flow in operation

Summary

I’m trying to create a private version to publish and I’m getting this error. Does anyone know how to fix it?

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Matchmaking

Steps to Reproduce

Creating a private version with the player on the map causes this error

Expected Result

Create a private version and calculate memory without problems

Observed Result

Parallel upstream flow in operation

Platform(s)

Computer

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Please try to delete all the files in

copy C:\Users%USERNAME%\AppData\Local\UnrealEditorFortnite to somewhere like
My documents

del C:\Users\%USERNAME%\AppData\Local\UnrealEditorFortnite

Then, is this does not works, make sure you “Verify” as here