Build failed with unknown error after iOS 15 update


I can’t build the game to test on my iPhone after updated it to iOS 15. I have changed nothing in the project files, it just throw back always this:

LogPlayLevel: AutomationTool exiting with ExitCode=1 (Error_Unknown)
LogPlayLevel: Completed Launch On Stage: Build Task, Time: 367.895149
PackagingResults: Error: Launch failed! Unknown Error

Once I try to start the game on phone it says: “Needs to be updated, the developer of this app needs to update it to work with this version of iOS.”

I am on 4.27.0, only blueprint project and it worked fine with iOS 14, no idea how to fix this.

Could it be a bug???


4.27.1 update solved the issue