I tried to change the Admin URL from the Backend from Stores>Configurations>Admin>Admin Base URL. I changed Use Custom Admin URL to YES and the text box opened to enter Custom URL where I entered the URL. I don't have PHPMyAdmin or anything. I can only access the database from SSH.
Magento Admin refreshed right away and now I only see the text-based version on Backend. I have tried going back to the same setting to disable it but "Save Config" (now simple text button) does not work either.
Please help, it is a live website and in production. Thank you in advance.