Not working

I tried it but when i want to insert it i get this code, it also does not work for featured image (there is no tab):

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_after_theme_options_save’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_default_settings’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_add_xml_to_upload_filetypes’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_import’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_export’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_save_settings’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_modify_layouts’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘ot_create_media_post’ not found or invalid function name in /www/htdocs/w00f0942/julian-weiland/multi/wp-includes/plugin.php on line 429

Fatal error: Call to undefined function ot_register_meta_box() in /www/htdocs/w00f0942/julian-weiland/multi/wp-content/themes/hueman/functions/meta-boxes.php on line 269

http://wordpress.org/plugins/network-shared-media/