Django Workflow bug

I had workflows working well, till a few days ago, when i get an error

There is no workflow designed to process “certificate name”.
You must specify different users roles and documents to issue before you proceed.

Then it asks design your workflow, but the workflows are there, anyone familiar with this bug, am running python 2.7.5 but will upgrade later, inherited the system from another developer, will appreciate any help and willing to pay to fix this thanks