Creating a schema, then an object in a reference Realm in Realm Studio results in the following:

• When creating the object, the Create-button seems to be non-responsive, but clicking it again shows a duplicate error (changes aren’t synced to Realm Studio, so the Realm still appears empty)
• Pressing Cancel, then reopening the Realm results in the following error shown in fullscreen:
  > Cannot read property ‘toString’ of undefined

Originally reported by a user through @nirinchev.