Can't load into UEFN level after update 34.20

@Flak Hi, could you help me understand what actions/info would be needed to involve Epic to troublshoot this critical issue that prevents dev work completely for the affected people?

Some more observations:

  • If I sync to a Revision Control’s OLD snapshot from Mar 24 (before 34.20 update) and don’t change it in Editor, I can start the Edit Session from UEFN

  • … but if I do any changes on top of that old snapshot, the same happens: Can’t start the Edit Session

  • If I create a Private Version from that OLD snapshot and set it as the Playtest build, I can start it fine from Lobby on all platforms I tried: PC, PS5, Xbox One

  • … but if I create a Private Version from the LATEST snapshot (done after 34.20 update), the game’s start status in Lobby gets stuck at “UPDATING… 100%” on all platforms (PC, PS5, Xbox One)