When you create a project in version 4.8.3, and update it to either 4.10 or Main, there seem to be issues loading the Engine Content Tutorials for FeaturePacks, InstallingiTunesTutorial, and SettingUpAndroidTutorial. When attempting to open these files, this error appears:
"Blueprint could not be loaded because it derives from an invalid class. Check to make sure the parent class for this blueprint hasn't been removed!"
1. Create a 4.8.3 Project
2. Update it to 4.10 or 4.11
3. In the Content Browser, go to View Options->Show Engine Content
4. In the Content Browser with Engine Content shown, go to Engine Content->Tutorial->Basics for Feature Packs, EngineContent->Tutorial->Mobile for InstallingiTunesTutorial and SettingUpAndroidTutorial.
5. Attempt to open any of the above-listed files
Result: The files will not open, and will show this error message: "Blueprint could not be loaded because it derives from an invalid class. Check to make sure the parent class for this blueprint hasn't been removed!"
Expected: The files would open without issue.
Head over to the existingAnswerHub thread and let us know what's up.