When i haven made a gallery and put the following shortcode on mij page
[ngg_images gallery_ids="1" exclusions="4,6" display_type="photocrati-nextgen_basic_slideshow" gallery_width="600" gallery_height="400"]
when i select phot i get this error
(?< at offset 19 in /var/www/vhosts/obsdepionier.com/httpdocs/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/router/mixin.url_manipulation.php on line 154
How can i solved this