Problema NextGen Gallery

Buona sera,
non so perchè, ma di punto in bianco non riesco ad aggiungere nuove gallerie ai miei posts. Quando schiaccio sull'icona per aggiungere una galleria o un album al post mi compare il popup con il seguente testo:

Codice:

object(stdClass)#5836 (28) { ["ID"]=> string(2) "56" ["post_author"]=> string(1) "1" ["post_date"]=> string(19) "2014-01-10 16:56:20" ["post_date_gmt"]=> string(19) "0000-00-00 00:00:00" ["post_title"]=> string(40) "NextGEN Basic TagCloud" ["post_excerpt"]=> string(0) "" ["post_status"]=> string(5) "draft" ["comment_status"]=> string(6) "closed" ["ping_status"]=> string(6) "closed" ["post_password"]=> string(0) "" ["post_name"]=> string(0) "" ["to_ping"]=> string(0) "" ["pinged"]=> string(0) "" ["post_modified"]=> string(19) "2014-03-01 19:40:22" ["post_modified_gmt"]=> string(19) "2014-03-01 18:40:22" ["post_content_filtered"]=> string(1232) "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" ["post_parent"]=> string(1) "0" ["guid"]=> string(40) "http://alessiadipol.altervista.org/?p=56" ["menu_order"]=> string(1) "0" ["post_type"]=> string(12) "display_type" ["post_mime_type"]=> string(0) "" ["comment_count"]=> string(1) "0" ["filter"]=> string(3) "raw" ["id_field"]=> string(2) "ID" ["settings"]=> array(1) { ["use_lightbox_effect"]=> bool(true) } ["preview_image_relpath"]=> string(0) "" ["default_source"]=> string(0) "" ["view_order"]=> int(10000) }

Ho già reinstallato il plugin, ma non è cambiato nulla. C'è un modo per ripristinare WordPress senza perdere i commenti presenti nel sito?

Grazie per l'attenzione