IndifferentHash Config Error

If you receive the following error after upgrading to 1.0.1:

Psych::DisallowedClass: Tried to load unspecified class: Sinatra::IndifferentHash

Perform the following steps:

  1. Go to Admin → Setup → game.yml in the web portal
  2. Select Advanced Editor at the bottom.

On the second line, you will see:

game: !ruby/hash:Sinatra::IndifferentHash

Remove the rubyhash nonsense, so it’s just:


Patch 1.0.2 has a fix that should prevent this from recurring, but if you see it again after updating please let me know.