Header.php throwing odd code

I currently have sp image slider running as my header with no real issues with the exceptions at certain times it will load the images a bit odd but that I’m resolving now. my question here is why when saving pages am i getting this following code which appears to be from the header.php file with something to do with the image slider header. the site is fiendingproject.com pass:templogin

any help on the best way to adjust this header.php code to keep it from throwing this code would be greatly appreciated and yes i know i need to child theme this which i will be doing prior to launching the site to the public once done. thanks again heres the code it is throwing
Warning: Missing argument 2 for wp_kses(), called in /home/fiending/public_html/wp-content/plugins/responsive-header-image-slider/responsive_headerimageslider.php on line 158 and defined in /home/fiending/public_html/wp-includes/kses.php on line 479

Warning: Cannot modify header information – headers already sent by (output started at /home/fiending/public_html/wp-includes/kses.php:479) in /home/fiending/public_html/wp-admin/post.php on line 233

Warning: Cannot modify header information – headers already sent by (output started at /home/fiending/public_html/wp-includes/kses.php:479) in /home/fiending/public_html/wp-includes/pluggable.php on line 896