The Production environment was backed up and those backups were used to create a new instance of the Development environment.
Everything else related to SharePoint and Nintex appears fine, user defined actions were exported and imported, etc. However, when I attempt to export a workflow from Production and then import it into a workflow in Development all the workflow actions disappear. It appears to leave a blank workflow in its place.
This happens with importing to new, or existing workflows. However, exporting a workflow from the Dev environment and importing it into a new or existing workflow in Dev works.
No errors appear or anything, just the empty workflow.
Both environments are running;
Nintex Workflow 2010 (126.96.36.199) - English
Any idea what may be the cause of this?