Hi, I am experiencing a problem with the menu of my website https://www.athanorgym.be. When clicking on the three lines for the menu on the upper left corner, a shade appears but the menu does not appear. On small screens, smartphones, tablets, this makes the menu inaccessible. I am not sure when the problem appeared, but most likely when I updated to the last version of helix_ultimate template and sp page builder pro.

Any hint on what to do ? Thanks