WordPress.org wrong redirect for login

I made some changes to my WordPress.org URL settings. Now I can’t login to my Website using the /wp-login.php link. First of all the theme is not loading which is the first odd thing. After I type in the correct credits and I press login I get redirectet to my domain but the last letter of the top-level-domain is missing resulting in: DNS_PROBE_FINISHED_NXDOMAIN. Maybe I forgot deleted it in the edit proccess or something else went wrong. I have access to a terminal but I don’t know which file to edit.