Turn it In has had a server issue cause a service interruption this weekend. They expect access to be restored no later than Tuesday. Users trying to submit a paper or trying to create an assignment may see an error message "Turnitin API base URL incorrect or unavailable" until then.
Until the problem is resolved, faculty can use the Assignment activity in Moodle for students who need to submit papers, and can later manually submit those papers to TurnitIn if they want. Our office can assist with this task. Email us at firstname.lastname@example.org, or call 280-5512 after 8:30 a.m. Monday.