browsing problem

i was installing new theme on my website here: https://www.HEVNgrafix.com ,and in the middle of customizing it’s contact data. i copy-paste a link from google map to my contact form on dashboard, but when i try to click “save”, it won’t work, my page keep loading and won’t show my website page

i tried to check my connection by browsing another page (like google.com) but it’s fine, i tried to open support forum via one of the page that i keep open in one of browser’s tab and it works just fine. i leave it overnight just in case maybe something still processing, but when i tried it again this morning, it still won’t work. it keeps loading over and over and won’t show my page nor my wordpress dashboard. i can’t even access my c-panel page

what is wrong here? what should i do?
thanks in advance