Update to Hotfix 2

Hello all

After Updating UCA with Hotfix 2 for 8.4.2 I am not longer able to retrieve data via Power-BI from MS. The query is quiet simply :
let
    Source = OData.Feed("http://xxxxxxxxx..ss.ccc.yy:1336"),
    ActiveDirectoryObjectSnapshots_table = Source{[Name="ActiveDirectoryObjectSnapshots",Signature="table"]}[Data],
    #"Removed Other Columns" = Table.SelectColumns(ActiveDirectoryObjectSnapshots_table,{"GroupType", "SamAccountName"}),
    #"Filtered Rows" = Table.SelectRows(#"Removed Other Columns", each [GroupType] = null),
    #"Filtered Rows1" = Table.SelectRows(#"Filtered Rows", each [SamAccountName] <> null and [SamAccountName] <> ""),
    Custom1 = #"Filtered Rows1"
in
    Custom1

Executing this immediately drops an error:

From what I can see UCA webpage works as usual. As usual slow, but it works

Any Idea would be welcome.

Thanks and regards

Peter