use get_permalink as get_the_permalink is just an alias anyway

public/partials/class-poet-consumer.php

@@ -93,7 +93,7 @@ public function consume() {
 		$tags       = implode( ',', $tags_array );
 
 		$body_array = array(
-			'canonicalUrl'  => get_the_permalink( $this->post->ID ),
+			'canonicalUrl'  => get_permalink( $this->post->ID ),
 			'name'          => get_the_title( $this->post->ID ),
 			'datePublished' => get_the_modified_time( 'c', $this->post ),
 			'dateCreated'   => get_the_time( 'c', $this->post ),