I have the same issue on 2 of my sites, but am not running multisite.
For each post that contains an image, this appears. And in posts with multiple images, it appears multiple times:
array(3) { ["entity_types"]=> array(1) { [0]=> string(30) "entity_types should be present" } ["name"]=> array(1) { [0]=> string(22) "name should be present" } ["title"]=> array(1) { [0]=> string(23) "title should be present" } }
Would like to add that when I go to Gallery > Gallery Settings, I get the following error 14 times and nothing in the drop-downs:
Warning: in_array() expects parameter 2 to be array, null given in /home/[xxx] /public_html/[xxx]/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_gallery_display/class.display_type_mapper.php on line 71