I'm actually running into this same issue in Nintex Workflow 2013. Were you able to resolve it?
Our team also ran into this issue. We identified the same issue in the Elements.xml in the WSP. This seems to be a nintex issue, and we have contacted nintex support with all of our research (2 days worth). We also provided the WSP. If they come back with a solution I will add it here.
Solution from Nintex:
Thank you for contacting Nintex support. Do you know if the site template was created before a Nintex update was performed? I ask because I came across another case for this same issue, below is the cause and resolution steps from that case:
"The 'IsProduction' Field was introduced in 3.1.7.0 for subscription based Nintex. It was later removed due to few critical bugs that we found. Hence, any of the sites which were created from a site template that was updated to the build had the isproduction field reference in there. Hence, we need to manually remove the references from the wsp file."
Here is the resolution :
-"Save Site as Template".
- Go to Solution Gallery, download the Solution (.wsp) file.
- Rename to .CAB, unpack the CAB.
- Edit the ListInstancesFilesNintexWorkflowsSchema.xml and remove the line:
<FieldRef ID="{50c3f294-1c48-406c-92e9-0f1b985b3aa8}" Name="IsProduction" Required="FALSE" Hidden="FALSE" />
Repack the CAB file, rename to .wsp, and re-upload the solution.
- Create a site from this site template and try to publish workflows.
Please let me know if that will work for you and if you have any other questions.
