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

I am on 2020 R1 and had an issue with JvD's solution. After running his script, I was able to open the customization browser, however the left-hand panel was blank which severely limits the browser's functionality. I noticed there were more missing rows for AU pages in the PortalMap than just AU000000 so I modified the script to pull all missing AU sites from SiteMap into PortalMap, which resolved my issue.

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 Like 'AU%'
      AND NOT EXISTS
(
    SELECT *
    FROM dbo.PortalMap
    WHERE CompanyID = dbo.SiteMap.CompanyID
          AND ScreenID = dbo.SiteMap.ScreenID
);