I have installed a nominatim server which serves lookups ok, for example
http://a.b.c.d/nominatim/lookup.php?osm_ids=N107775 -->200 result, json data on london
does fine, but the server returns an internal server error on string searches:
http://a.b.c.d/nominatim/search.php?q=new%20york → 500 error
Is there an easy way to debug on the server , e.g. a log of requests and responses?