Combine & Transform JSON files Error

[NSivarajah]

I am trying to combine & transform multiple JSON files. These steps are applied automatically:

let

Source = Json.Document(Parameter2),
#"Converted to Table" = Table.FromList(Source, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
#"Expanded Column1" = Table.ExpandRecordColumn(#"Converted to Table", "Column1", {"timestamp", "value"}, {"timestamp", "value"}),
#"Changed Type" = Table.TransformColumnTypes(#"Expanded Column1",{{"timestamp", Int64.Type}, {"value", type number}})

in

#"Changed Type"

The table with the 2 columns "timestamp" and "value" is created successfully but after applying the Power Query steps in Power BI, I am getting following message:

I am not able to figure out what to do.

Can someone help?

Thanks

[Syndicate_Admin]

Please provide sample data (with sensitive information removed) that covers your issue or question completely, in a usable format (not as a screenshot). Leave out anything not related to the issue.
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