Same here. Preview has NOT worked for me since I updated Xcode to version 15, 15.1, 15.1 beta 3. FAIL!
NOTE: In Xcode 15.1 beta 3, the preview window DID show "AppLaunchTimeoutError: Failed to launch app xxxx in reasonable time" in the Diagnostics, but after closing the Diagnostics window (and walking away for several minutes to do some chores), it now surprisingly displays correctly in the Preview window!
Topic:
Developer Tools & Services
SubTopic:
Xcode
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