Hi there!
Sorry for the delayed response.
I have checked your offcanvas menu and it's working fine now: https://prnt.sc/Ib5Sx0TvpClX
Is this issue solved already?
Moreover, did you follow external link adding rules from here for your search menu also?
https://www.joomshaper.com/documentation/joomla-templates/oneclip/how-to-use-menu-links
I have logged in and put the "no-scroll" class in the required field and the search menu item is also working now:)
https://prnt.sc/1Ax8P3W5Va1b
Have a nice day!
Best Regards