Downloading installation package from https://downloads.wordpress.org/plugin/wp-file-manager.6.1.7.zip…

Download failed. Not Found

Warning: Cannot modify header information - headers already sent by (output started at /mnt/web210/c3/84/52672484/htdocs/sideguard.de/wp-content/themes/main_theme/functions.php:1) in /mnt/web210/c3/84/52672484/htdocs/sideguard.de/wp-includes/pluggable.php on line 1531 Warning: Cannot modify header information - headers already sent by (output started at /mnt/web210/c3/84/52672484/htdocs/sideguard.de/wp-content/themes/main_theme/functions.php:1) in /mnt/web210/c3/84/52672484/htdocs/sideguard.de/wp-includes/pluggable.php on line 1534