NextGen gallery: no images were found

Sometimes I get the message NO IMAGES WERE FOUND

2 weeks ago I’ve tried the following:
I’ve tried the new code for a thumbnail gallery ([ngg_images gallery_ids=”1″ display_type=”photocrati-nextgen_basic_thumbnails”]) but it also showed ‘no images were found’. So I’ve tried the new shortcode for 1 image (

[ngg_images image_ids=”1″ display_type=”photocrati-nextgen_basic_singlepic”]) and believe it or not, this image showed up! Now I’ve refreshed the page and ALL galleries are back again! Even the ones with the old code!

But since today, images have disappeared again… Even though I haven’t installed anything new!

Hope you can help!