Problem solved. The screw circled in red need to be advanced slightly. The nut has to be loosened and from the opposite side, tighten the screw again. As Phillip says it’s “ a little fiddley” but it worked.
@julievinsant1 Ah brilliant! So glad you managed to sort that out. Thank you for following up with pictures too, that will be helpful for other students as well.
Problem solved. The screw circled in red need to be advanced slightly. The nut has to be loosened and from the opposite side, tighten the screw again. As Phillip says it’s “ a little fiddley” but it worked.