I have the same issue. Did you find any solutions? The widget of an app I am working on works on macOS Sonoma, but not on Sequoia. I could be wrong but that makes me feel like it's a macOS bug?

Found a post about the same error here. https://social.dezinezync.com/@nikhil/113196113155693584

Thanks for the response. Yes, it could reproduce it with Thread 1: Fatal error: Failed to create the model container: SwiftDataError(_error: SwiftData.SwiftDataError._Error.loadIssueModelContainer, _explanation: nil) error in DataModel.swift. macOS: 15.1 (24B83) Xcode: 16.1 (16B40)

Thank you for the response. The app I am working on is a macOS app. Does that work with the workaround too? Also, do you know when the bug will be fixed?

@Hemanth.Alluri Thank you for the potential solutions. I still use IntentConfiguration instead of AppIntentConfiguration, so it might be the reason. Thanks again.