Help submenu problem

Hi WP theme 2016 child hosted by godaddy. Chat.kiwi.nz
My submenus are opening left and on some devices this means they disappear. They need to open right. Can someone assist me please to do this. I have very limited code changing experience, but mangaged to do it once safetly (hence the child).
Am still having html eror message too when upload media particualry larlger media files like 8MB images. Your read this first suggestion of disabling all plugins gave me temp and intermittent fix.
Thanks A team
Ananda