dropdowns, mobile menu and variable descriptions not working

I’m sitting with a couple of issues

https://www.gasextreme.co.za/product/cadac-stratos-bbq/
variable descriptions stopped working – they used to be there and are now not displaying and items with variable cant be added to basket

https://www.gasextreme.co.za/ on a mobile device the navigation menu does not work at all

https://www.gasextreme.co.za/shop/ if you try to find products from the category dropdown menu nothing happens. you can click and select but it has no effect.

can anyone please assist me? i have disabled all my plugins except woocommerce of course and it made no difference