If you run the below script into Genprodba04, changing the *'s for the client ref, this will return the error as to why the call us page is showing.
USE CWS
SELECT c.DMSRef,
rs.ReviewSessionOutcomeId,
rs.ReviewCallUsReasonId,
rs.SessionStart,
rs.SessionEnd,
rs.Violations,
ro.Description
FROM dbo.ReviewSessions rs
JOIN dbo.ReviewCallUsReasonOutcomes ro ON ro.Id = rs.ReviewCallUsReasonId
JOIN dbo.Clients c ON c.Id = rs.ClientId
WHERE rs.ClientId IN (
SELECT id FROM dbo.Clients
WHERE DMSRef IN (****))
ORDER BY rs.ClientId, rs.SessionEnd desc