Go to the ‘My account page’and look for your list of courses. Once you have completed one you’ll see a blue wax seal icon under the ‘Certificate’ column. Click on the icon.
You should also be aware of the browser you use. Firefox tends to work the best, Safari or Chrome are pretty good (though Chrome updates can cause problems) and some users have found Microsoft Edge works well. Sometimes it’s a case of trying them out – o download them click on the below links: