Client Crash on "End Game" (v39.50)

General Issues and Bug Reporting
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3

Hi all,

Further update on this

  1. Take a previous published game Feature Example 39.40 in UEFN that was working properly in UEFN
  2. Open UEFN
  3. Launch Fortnite on PC on 39.50
  4. Game starts
  5. Screen goes very big only letter F O R T N can be seen
  6. Error Match Making Error hash 3 Invalid Session ID
  7. Fortnite log is
  8. [2026.02.19-17.13.52:771][223]MatchmakingLog: [3da9] Island Manager Shutdown
    [2026.02.19-17.13.52:771][223]MatchmakingLog: [2dfe] Island Refresh Stopped
    [2026.02.19-17.13.52:773][223]MatchmakingLog: Error: [399a] No Local Player
    [2026.02.19-17.13.52:775][223]MatchmakingLog: Error: [2cc3] Invalid core MCP profile
    [2026.02.19-17.13.52:775][223]MatchmakingLog: Error: [2d10] Invalid core MCP profile
    [2026.02.19-17.13.52:780][223]MatchmakingLog: [3d9a] Resetting mode for island [ Island: UEFN Session
  1. When running again the Fortnite did same again but looks like the FN game crashed probably with match making but log did not get out to PC
  2. UEFN return Session Disconnected

FortniteGameLog3950line19809and3940Backup.zip (567.0 KB)

The fix to large screen is change from 1920 x 1080 from 1280 x 720

39.50 Fortnite Creative ignores Windows screen size 1280 x 720 - General / Issues and Bug Reporting - Epic Developer Community Forums