I’m still not clear where your “WP Admin” is. You say “I am not able to log on to the WP admin to check the site live” but then “once back into to admin panel, I updated the file”. I don’t understand how you cannot log on to the WP Admin to check your live site, but you can go “back into the admin panel”, make a change and have it take your site offline.
So, what happens if you go into the editor and delete everything in functions.php, then save it. Does your site come back up? If not, to get your site going again you’d best FTP the original functions.php file back. Then, as a test, in the functions.php that has the code, put // in front of the first “load_theme_textdomain” line (that’s the line the compiler is complaining about) to make it a comment, then FTP it up to your site. If there’s still an error then my guess is there’s something going on with your host.