Turnitin unavailable in some Blackboard courses

We are experiencing some problems accessing Turnitin in some of our Blackboard courses following our upgrade yesterday.  If you find that you have lost access to the Turnitin tool in your course please follow these steps:

From the Course Management menu click Customisation > Tool Availability and then put a tick next to the Turnitin options in the page of tools that appears > click submit.  (please leave Turnitin basic tools unticked)