There is currently an issue with the Canvas integration of Turnitin where users' browsers are automatically zoomed in, which makes the continue button seem to be missing and out of reach. This is currently affecting all browsers.
We have found that this bug is only happening with Assignments that have a lengthy set of instructions or several videos embedded on the assignment page. The best solution we have found to this issue is to have instructors adjust the Turnitin assignment settings to that the assignment opens in a new tab.
To change this Turnitin Assignment setting: