Trace log:

[0.0000] log started.
[0.0001] RH: creating DBAL
[0.0007] RH: creating TPL
[0.0010] RH: creating MSG
[0.0014] RH: constructor done
[0.0042] ERROR [!....]: DBAL [mysql] Error: Query failed: SELECT DISTINCT catalogue_photos.photo_id FROM catalogue_photos LEFT JOIN catalogue_photos_to_themes ON catalogue_photos_to_themes.photo_id=catalogue_photos.photo_id LEFT JOIN catalogue_themes ON catalogue_themes.tree_id=catalogue_photos_to_themes.tree_id LEFT JOIN catalogue_authors ON catalogue_authors.user_id=catalogue_photos.author_id WHERE catalogue_photos.OnView=1 AND catalogue_authors.surname LIKE '%Яковлев%' AND catalogue_authors.name LIKE '%Олег%' AND () AND () ORDER BY catalogue_photos.mark DESC, catalogue_photos.photo_id DESC (You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AND () ORDER BY catalogue_photos.mark DESC, catalogue_photos.photo_id DESC' at line 1)
[0.0043] log flushed.

prematurely dying.