After adding WP Portfolio shortcode to the page or post, sometimes you might see No Items Found message in the front end. In this case, try to flush the permalinks once.
Below are the steps to follow –
Step 1: In the WordPress admin area, go to 「Settings > Permalinks」.
Step 2: Click 「Save Changes」.
Step 3: Permalinks and rewrite rules are flushed.
No Items Found message – flush the permalinks.
No Items Found message – flush the permalinks.