Some PHP Errors with this theme and LeagueManager Plugin

Hi,
I like your theme, but when i install and activate LeagueManager I have an error (white site) when I add something in my posts with the buttons.

[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_after_theme_options_save’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_default_settings’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_add_xml_to_upload_filetypes’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_import’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_export’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_save_settings’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_modify_layouts’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘ot_create_media_post’ was given in /var/www/webXXX/html/wp/wp-includes/plugin.php on line 429
[28-Jan-2014 20:51:15] PHP Fatal error: Call to undefined function ot_register_meta_box() in /var/www/webXXX/html/wp/wp-content/themes/hueman/functions/meta-boxes.php on line 269