h1 title invisible and h3 title duplicated and h2 titles cant edit theme

[glowry]

the h2 pays/region i cant edit it because its not available as an option and the h1 is invisible and Article ajouté au panier is not available as an option to edit as well and all of my h3 are duplicated i am using the Studio Theme
my website is https://plitable.com/ and i have the problem on all my pages