Another issues

I am geting a lot of this everytime I publish:

Warning: html_entity_decode() expects parameter 1 to be string, array given in /home/estudiol/public_html/wp-content/plugins/flickr-shortcode-importer/includes/class-flickr-shortcode-importer.php on line 1031

Warning: Cannot modify header information – headers already sent by (output started at /home/estudiol/public_html/wp-content/plugins/flickr-shortcode-importer/includes/class-flickr-shortcode-importer.php:1016) in /home/estudiol/public_html/wp-admin/post.php on line 235

https://wordpress.org/plugins/flickr-shortcode-importer/