Xcode 27 cannot open storyboards or create simulators

Hi. Today we upgraded to Xcode 27 and installed the iOS 27 runtime component. Now storyboards cannot be opened. Xcode only displays "Loading iOS 27.0..." Besides, we cannot create simulators either. iOS 27 runtime appears missing even though it is installed.

We tried removing and reinstalling the runtime but it didn't work. Right now all development came to a halt. Please help.

Xcode 27 cannot open storyboards or create simulators
 
 
Q