Undefined property: CPTP_Module_Permalink

Undefined property: CPTP_Module_Permalink::$post_type (Error)

In Permalink.php, line 72:

$parent_structure = trim( CPTP_Util::get_permalink_structure( $this->post_type ), "/");

should be:

$parent_structure = trim( CPTP_Util::get_permalink_structure( $post->post_type ), "/");

notice $this > $post

https://wordpress.org/plugins/custom-post-type-permalinks/