Automatic youtube posts plugin is not working

hi,

I am new to wordpress i maintain video site, so i use the plugin automatic youtube posts but whenever i add youtube channel in the plugin it shows error

Warning: Illegal string offset ‘attributes’ in /home2/tamildai/public_html/www.angitv.com/wp-content/plugins/automatic-youtube-video-posts/class/xml.php on line 377

Warning: Cannot modify header information – headers already sent by (output started at /home2/tamildai/public_html/www.angitv.com/wp-content/plugins/automatic-youtube-video-posts/class/xml.php:377) in /home2/tamildai/public_html/www.angitv.com/wp-includes/option.php on line 564

i am using detube theme,
how to solve the plugin problem? i am also using another domain which same theme and same plugin it works fine but not work in this site only