Query regarding salesforce integration with thingworx

Hello 

I am referencing the below link for salesforce integration with thingworx

Connecting to Salesforce with ThingWorx | EACPDS

On following the mentioned steps while authenticating salesforce session in thingworx , I came across an error -

I am a fresher and new to thingworx and also to salesforce , major aim is to integrate salesforce with thingworx, so help me rectify this error. Or let me know if there is any other method or way to do the same