menu on mobile version doesn't show up

Hi,

1) I’m not sure what’s happening with the mobile version of my theme, but it seems like the menu gets “stuck” and you can’t access it (to navigate to other pages of the site) whilst viewing my site on mobile.

My site is https://www.geometrickskies.com

2) Secondly I wanted to hide the right side bar on the mobile version – I tried ticking this option under “optimiser mobile options” – but no matter if I check it or uncheck it – it makes no change.

Any help would be much appreciated!