This site can’t be reached server DNS address could not be found.

while my wesite url https://techeasy.in to https://www.techeasy.in, i did mistake and wrote wwwww and save it in wordpress admin pannel>>setting>> general>> url section then when i try to open https://techeasy.in/wp-admin it shows

This site can’t be reached

wwww.techeasy.in’s server DNS address could not be found.
Go to https://www.techeasy.in/
Search Google for wwww techeasy admin
ERR_NAME_NOT_RESOLVED