Ошибка при установке AutoMOD

[vvo]

После инсталяции мода при переходе в админке на вкладку возникли ошибки

[phpBB Debug] PHP Notice: in file /includes/acp/acp_mods.php on line 319: Undefined index: SORT_NAME
[phpBB Debug] PHP Warning: in file /adm/index.php on line 154: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3777)
[phpBB Debug] PHP Warning: in file /adm/index.php on line 156: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3777)
[phpBB Debug] PHP Warning: in file /adm/index.php on line 157: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3777)
[phpBB Debug] PHP Warning: in file /adm/index.php on line 158: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3777)

В чем причина и как исправить?