I often run the web browser in half screen mode, for a size of 960 pixels wide.
You cannot click on the leftmost or rightmost button because the ribbon border is extending about 72 pixels into the main screen, and those cover up the buttons. You'd need to click on the rightmost 1/3 of the Matching button, or the leftmost 1/3 of the Account button. The center won't work.
Attached a screenshot. You can't click in the red highlighted areas.
Edit: See CSS style "pointer-events: none;" for a possible solution.