Error running after creating a model to use gridfs as datasource

[benawarez]

I have a working solution... however, after installing this module, updating the datasources.json, and created a model to use it as a datasource, I get the following when running:

E:\Dev\Demo>node .
E:\Dev\Demo\node_modules\loopback-datasource-juggler\lib\datasource.js:481
modelClass[r.type].call(modelClass, rn, params);
^
TypeError: Cannot read property 'call' of undefined
at E:\Dev\Demo\node_modules\loopback-datasource-juggler\lib\datasource.js:481:27
at Array.forEach (native)
at DataSource.defineRelations (E:\Dev\Demo\node_modules\loopback-datasource-juggler\lib\datasource.js:442:28)
at DataSource.setupDataAccess (E:\Dev\Demo\node_modules\loopback-datasource-juggler\lib\datasource.js:522:8)
at DataSource.attach (E:\Dev\Demo\node_modules\loopback-datasource-juggler\lib\datasource.js:738:8)
at Function.ModelClass.attachTo (E:\Dev\Demo\node_modules\loopback-datasource-juggler\lib\model-builder.js:331:16)
at Registry.configureModel (E:\Dev\Demo\node_modules\loopback\lib\registry.js:238:15)
at configureModel (E:\Dev\Demo\node_modules\loopback\lib\application.js:438:16)
at EventEmitter.app.model (E:\Dev\Demo\node_modules\loopback\lib\application.js:132:5)
at E:\Dev\Demo\node_modules\loopback-boot\lib\executor.js:172:9

No error is produced as long as no model is using gridfs as the datasource.

Any thoughts? I would really appreciate your help. Thanks.