I have just tried to update my WordPress and it said it hadn’t worked and now my website has gone. When I try to go to my website I get the following page.
Fatal error: Cannot redeclare wp_convert_bytes_to_hr() (previously declared in /www/htdocs/postbach/wp-includes/deprecated.php:3364) in /www/htdocs/postbach/wp-includes/media.php on line 1146
My website is https://www.bacharach-pension.de
I am not a computer expert so I need help in the most basic language possible. Thank you.
