Issue
Nintex Workflow features will not activate in a Site Collection.
Resolution
Deactivate the Nintex Workflow Site Collection feature using the following command in SharePoint Management Shell:
Disable-SPFeature -Url http://[sitecollurl] -Identity '0561d315-d5db-4736-929e-26da142812c5' -Confirm:$false
Next delete the following libraries:
Navigate to yoursiteurl.com - This website is for sale! - yoursiteurl Resources and Information. > Library Settings > Delete this library
Navigate to Loading... > Library Settings > Delete this library
Once the above is complete, run the following command to enable the Site Collection Feature.
Enable-SPFeature -Url http://[sitecollurl] -Identity '0561d315-d5db-4736-929e-26da142812c5' -force
Disable-SPFeature -Url http://[sitecollurl] -Identity '0561d315-d5db-4736-929e-26da142812c5' -Confirm:$false
Next delete the following libraries:
Navigate to yoursiteurl.com - This website is for sale! - yoursiteurl Resources and Information. > Library Settings > Delete this library
Navigate to Loading... > Library Settings > Delete this library
Once the above is complete, run the following command to enable the Site Collection Feature.
Enable-SPFeature -Url http://[sitecollurl] -Identity '0561d315-d5db-4736-929e-26da142812c5' -force