thanks, in the meantime i did some analysis and found that the problem is to pass an arrangio to strip_tag() on formatting.php.
i tried to add a check to sanitize_title_with_dashes if the variable is an array and transform to a string. In that way the plugin started to work properly.
I didn’t get why an array is doing that kind of check and if the array is recipient from UM checkbook or any other field in my profile module.