Postgresql: Error missing FROM-clause entry for table - postgresql

Question

I have a query and I keep getting this a 'missing FROM-clase entry for table e, rx.rootentityid = rh.entityid1 AND rh.schoolid = e.schoolid'.
can anyone see the error in my code. My postgresql knowledge is very limited.
SELECT
eh.entityid1, eh.entityname1, eh.entityid2, eh.entityname2,
eh.entityid3, eh.entityname3, eh.entityid4, eh.entityname4,
eh.entityid5, eh.entityname5, eh.entityid6, eh.entityname6,
eh.entityid7, eh.entityname7, eh.schoolentityid, eh.schoolid,
eh.emiscode, eh.schoolname, rh.entityid1 AS reportentityid1,
rh.entityname1 AS reportentityname1, rh.entityid2 AS reportentityid2,
rh.entityname2 AS reportentityname2
FROM dbo.vwentityhierarchyname
JOIN dbo.entity AS eh
ON vwentityhierarchyname.entityid1 = eh.entityid AND eh.entitytypeid = 1
CROSS JOIN (SELECT
hd.rootentityid
FROM dbo.hierarchydefinition AS hd
JOIN dbo.entity AS e
ON hd.rootentityid = e.entityid
WHERE hd.relatedrootentityid = e.entityid AND hd.entitytypeid = 7 AND LOWER(e.name) SIMILAR TO LOWER('%Report Regions%')) AS rx
LEFT OUTER JOIN dbo.vwentityhierarchyname AS rh
ON rx.rootentityid = rh.entityid1 AND rh.schoolid = e.schoolid
WHERE eh.schoolid = par_SchoolID
ORDER BY eh.entityid1 DESC NULLS FIRST
LIMIT 1;
Thanks