Trying to enable the widget throws an error

Issue Summary

If a site is recently imported from another Cloud site where the widget was enabled, when trying to access the Widget page in a service project, an error message is displayed and it's not possible to enable the feature.

Steps to Reproduce

1. Go to a service project > Project settings
2. Click on Widget

Expected Results

The widget settings will appear.

Actual Results

The error message below is displayed and there are no options available.

Workaround

None at this moment. Contact Atlassian Support.