Can't log-in after messing up wp-config and functions.php

Dear Enfold team,

I am struggling to log in to my page. However the site shows up almost perfect (except for the full width images are somehow too big) When I try to log in i get an error message:

“Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘wp_schedule_delete_old_privacy_export_files’ not found or invalid function name in /home/kozeppont.com/wcftp00202/www/build/wp-includes/class-wp-hook.php on line 286 Warning: Cannot modify header information – headers already sent by (output started at /home/kozeppont.com/wcftp00202/www/build/wp-config.php:1) in /home/kozeppont.com/wcftp00202/www/build/wp-login.php on line 423 Warning: Cannot modify header information – headers already sent by (output started at /home/kozeppont.com/wcftp00202/www/build/wp-config.php:1) in /home/kozeppont.com/wcftp00202/www/build/wp-login.php on line 436”

The initial thing that conducted this problem was: I tried to cange my site from /build to root. First I renamed both options in the admin to: kozeppont.com instead of kozeppont.com/build. That messed up the whole page and I wasn’t even able to log in again so I added changes to wp-config and to functions.php, that managed to get back the content, but not the admin page… Thank you very much in advance if you can help me to solve this.