When integrating Salesforce with K2 Cloud, the following error may appear:
"Exception of type SourceCode.SmartObjects.Client.... was thrown."
This error will be presented when you try to authenticate against the Salesforce Connected App as per the steps in the K2 Cloud User Guide under Administer > K2 Management > Features > Integrating with SalesForce.
For reference view this guide.
The developers identified this as an issue within the K2 Product, and it has been resolved in the latest K2 Cloud update.