Close your Blackboard Collaborate Classroom.
Click the Start button and type Blackboard and you should see "Blackboard Collaborate Launcher" appear in the list. Please click it.
Once opened, click on the Advanced tab and click the Clear Cache button.
Open Blackboard Collaborate. If you receive the same error please contact our help desk at 1-877-235-4123 (1-877-CDLI-123).