GalleryEmbed::getImageBlock failed, here is the error message: Error (ERROR_STORAGE_FAILURE)

• in modules\core\classes\GalleryStorage.class at line 239 (gallerycoreapi::error)
• in modules\core\classes\GalleryStorage.class at line 470 (mysqlstorage::_getconnection)
• in modules\core\classes\Gallery.class at line 209 (mysqlstorage::search)
• in modules\core\classes\helpers\GalleryUserGroupHelper_simple.class at line 105 (gallery::search)
• in modules\core\classes\GalleryCoreApi.class at line 1876 (galleryusergrouphelper_simple::fetchgroupsforuser)
• in modules\core\classes\helpers\GalleryPermissionHelper_simple.class at line 64 (gallerycoreapi::fetchgroupsforuser)
• in modules\core\classes\helpers\GalleryPermissionHelper_simple.class at line 39 (gallerypermissionhelper_simple::_fetchaccesslistids)
• in modules\core\classes\GalleryCoreApi.class at line 501 (gallerypermissionhelper_simple::fetchaccesslistids)
• in modules\core\classes\helpers\GalleryUserHelper_simple.class at line 76 (gallerycoreapi::fetchaccesslistids)
• in modules\core\classes\GalleryCoreApi.class at line 566 (galleryuserhelper_simple::hasitempermission)
• in modules\core\classes\GalleryView.class at line 362 (gallerycoreapi::hasitempermission)
• in modules\core\classes\GalleryTemplate.class at line 558 (galleryview::getitem)
• in modules\core\classes\GalleryTemplate.class at line 264 (gallerytemplate::_getthemeid)
• in modules\core\classes\GalleryTemplate.class at line 214 (gallerytemplate::_initcompiledtemplatedir)
• in modules\core\classes\GalleryEmbed.class at line 1034 (gallerytemplate::fetch)
• in modules\core\classes\GalleryEmbed.class at line 852 (galleryembed::getblock)
• in minishow.php at line 36 (galleryembed::getimageblock)