Symptoms

When attempting to create a package from Web Package and Deployment, a package is not generated and the download prompt does not appear the screen goes blank.
 

Diagnoses

SmartObject logging indicates the following error:

Access the path 'C:ProgramDataSourceCodeTemp{randomcharacters}.kspx{guid}' is denied.
Service: PackageDeploymentService

It appears the K2 Service Account only have 'Special permissions' to this directory.
 

Resolution

Granting the K2 Service Account Full Control to this directory 'C:ProgramDataSourceCodeTemp' resolved the issue. As there appears to be a documentation gap, a documentation enhancement request was logged.