Cannot Customize using customize browser on portal

Question

I associated a business account for an unrestricted external user and have provided both portal admin and customizer roles but still cannot customize on the portal and when

Answer 1

Thanks Peter Rankin I updated my script the same way and it worked for 2019R1

INSERT INTO dbo.PortalMap
(
    CompanyID,
    Position,
    Title,
    Description,
    Url,
    ScreenID,
    CompanyMask,
    NodeID,
    ParentID,
    CreatedByID,
    CreatedByScreenID,
    CreatedDateTime,
    LastModifiedByID,
    LastModifiedByScreenID,
    LastModifiedDateTime,
    RecordSourceID
)
SELECT CompanyID,
       Position,
       Title,
       Description,
       Url,
       ScreenID,
       CompanyMask,
       NodeID,
       ParentID,
       CreatedByID,
       CreatedByScreenID,
       CreatedDateTime,
       LastModifiedByID,
       LastModifiedByScreenID,
       LastModifiedDateTime,
       RecordSourceID
FROM dbo.SiteMap
WHERE ScreenID = 'AU000000'
      AND NOT EXISTS
(
    SELECT *
    FROM dbo.PortalMap
    WHERE CompanyID = dbo.SiteMap.CompanyID
          AND ScreenID = dbo.SiteMap.ScreenID
);