Symptoms

When opening a K2 Project/Process in K2 Studio, an error message appears:

"Object reference not set to an instance of an object"
 

Diagnoses

The error seems to be occurring when it's retrieving the environment fields. It was then found that the "Default" servers in the Environment Fields has not been set. (K2 Workspace > Management Console > Environment Library)
 

Resolution

After making sure there is a default entry for the following servers, the process was able to load fine in K2 Studio.

- Category Server
- Mail Server
- ServiceObject Server
- SmartForms Server
- SmartObject Server
- Workflow Management Server
- Workflow Server