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Fixes:
[DFS-1424] - Fixed SQL script, updated video player quality id's.
[DFS-1425] - Fixed issue with an exception when trying to display images on CD which is not cached and there is no connection to DC.
[DFS-1427] - Fixed issue with synchronizing multi languages.
[DFS-1431] - Fixed missing file "Sitecore xhtml.xsd"
[DFS-1432] - Fixed issue with the example page throwsthrowing .net error errors if there where broken links.
[DFS-1447] - Sitecore 9.1 Identity Server support
[DFS-1450] - Fixed issue when closing the metadata editor it's being reloaded again