Fix bug "get_the_terms" on wordpress 4.4. you can add the patch yourself to the category-template.php in the wp-includes directory replacing the get_the_terms function.

category-template.php

<?php
function get_the_terms( $post, $taxonomy ) {
	if ( ! $post = get_post( $post ) )
		return false;

	$terms = get_object_term_cache( $post->ID, $taxonomy );

	if(false === $terms || empty($terms)){
		$terms = wp_get_post_terms( $post->ID, $taxonomy );
		if ( ! is_wp_error( $terms ) ) {
			$to_cache = array();
			foreach ( $terms as $key => $term ) {
				$to_cache[ $key ] = $term->data;
			}
			wp_cache_add( $post->ID, $to_cache, $taxonomy . '_relationships' );
		}
	}
?>