Problem with using Depot.add, callback never get trigger and the line after the add never get executed. Failed silently…

depot.add.js

var db = new Mojo.Depot(
  { name: 'my_wordpress_db', version: 1, estimatedSize: 25000, replace: false },
  function() { Mojo.Log.info('Success'); },
  function(error) { Mojo.Log.warn('Unable to open database (#' +error+ ')' ); }
);

// NOT WORKING
db.add(
  'address', 'address',
  function(){ Mojo.Log.info('Address Added'); },
  function(error) { Mojo.Log.warn('Unable to saved. %j', error) }
);

// NOT WORKING
db.add(
  'address', {value: 'address'},
  function(){ Mojo.Log.info('Address Added'); },
  function(error) { Mojo.Log.warn('Unable to saved. %j', error) }
);