Unable to deploy any Workflow in K2 Five with the following error appearing:
"Missing reference at emailconfiguration in Event 'Send Mail. Error Object reference not set to an instance of an object ...Stack Location Process 'Send Mail' >Email Event ''Send Mail > end Stack"
This occurs due to the user permission levels that are set on the environmental field that is blocking the deployment on the development Environment Field, that is set as Default.
To resolve this, remove the permission to allow the workflow to deploy successfully.
Note if there are users specified on Security level, only the users specified will be able to deploy the workflow with read-only or modify rights. If there is no security specified everyone will be able to deploy workflows.