Can't load a document after workflow completion

Document view is not loaded, with an error in console:
"elements.vulcanized.html:2818 Uncaught TypeError: Cannot read property 'workflowModelName' of undefined"

To reproduce:
Pickup a document in "project" state. Start a parallel workflow and complete it, choosing Administrator. Validate all the tasks. In the end, the document view is displayed without being refreshed (that's another bug in the sprint). If you try to relaod, even with full refresh, you get the error. Even after several reloads you get the error.

To remove the error, one needs to browse a document that doesn't have this error, then switch back to the other docucment, and it works.