Illegal string offset Detube Theme Error after publish post

i have this error on my theme after updating wordpress. how to fix it Help!!!

Warning: Illegal string offset ‘type’ in /home/sitename/public_html/wp-content/themes/detube/admin/panel.php on line 692

Warning: Cannot modify header information – headers already sent by (output started at /home/dramain/public_html/wp-content/themes/detube/admin/panel.php:692) in /home/sitename/public_html/wp-admin/post.php on line 233

Warning: Cannot modify header information – headers already sent by (output started at /home/dramain/public_html/wp-content/themes/detube/admin/panel.php:692) in /home/sitename/public_html/wp-includes/pluggable.php on line 1178