CRITICAL: Can no longer launch session after v30.0 checkin

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

World Building

Summary

Since the v30 update we can no longer launch session and are getting an error after the game loads:

LogWindows: Error: appError called: Assertion failed: IsValidCoords(InCoords) [File:D:\build++Fortnite\Sync\Engine\Source\Runtime\Engine\Public\WorldPartition\RuntimeSpatialHash\RuntimeSpatialHashGridHelper.h] [Line: 352]

Reverting in URC to a version from before the update, allows us to launch again we found out today. But we rather not lose 4 days of progress.

Steps to Reproduce

  1. Open our project
  2. Launch session

Expected Result

The project can launch session and the game opens

Observed Result

The game goes back to the Fortnite homepage and the editor throws an error

Platform(s)

PC

Additional Notes

Already tried rebuilding world partition

Real troubles trying to connect 4 times and always had identification timeout while verification of supervised parameters… ??