Steps to Reproduce
1. Login an early London instance as admin.
2. Scroll or filter the navigator to show the Studio module.
3. Click on the Studio module star icon to add it to your Favorites.
This problem was fixed. There is no workaround available. If you are able to upgrade, review the Fixed In or Intended Fix Version fields to determine whether any versions have a planned or permanent fix.
Related Problem: PRB1314612