Very similar problem than ZBX-5985:

pg_query(): Query failed: ERROR: column "wt.*" does not exist
LINE 1: SELECT COUNT("wt.*") AS cnt FROM httptest wt,applications a ...
^ [include/db.inc.php:440]
Error in query [SELECT COUNT("wt.*") AS cnt FROM httptest wt,applications a WHERE a.applicationid=wt.applicationid AND (wt.httptestid IN ('4')) ] [ERROR: column "wt.*" does not exist
LINE 1: SELECT COUNT("wt.*") AS cnt FROM httptest wt,applications a ...
^]
pg_fetch_assoc() expects parameter 1 to be resource, boolean given [include/db.inc.php:577]
pg_free_result() expects parameter 1 to be resource, boolean given [include/db.inc.php:578]