hi love the plugin

hi
i love the simplicity of the plugin

but im getting an eror
Warning: sprintf(): Too few arguments in /home/collectz/public_html/liathadas/wp-content/plugins/pinterest-pin-it-button-for-images/ppibfi_pinterest.php on line 238

where images are

any clues how to fix it

tnx

https://wordpress.org/plugins/pinterest-pin-it-button-for-images/