Since the 5.0.0 release we are unable to use Realm Studio to open Realms freshly created with 5.0.0 or Realms that were previously 4.x.x.
The error is: Invalid top array
It works with all projects that have not updated to 5.0.0
macOS 10.15.x (and 10.14.x)
Realm Studio 3.10.0