OLE DB or ODBC error: [Expression.Error] We cannot convert a value of type Record to type Table

Hey, 

when using the advance editor I can see the tables and fields as desired within the query editor but when I click close & apply,

I receive the error:

OLE DB or ODBC error: [Expression.Error] We cannot convert a value of type Record to type Table

Here is the code:

let

    Source = Json.Document(Web.Contents(),

    #"Converted to Table" = Record.ToTable(Source),

    #"Expanded Value"=Table.ExpandListColumn(#"Converted to Table","Value"),

    #"Expanded Value1"=Table.ExpandRecordColumn(#"Expanded Value","Value",{"u_subcategory","number","company","u_service_profile","assignment_group","assigned_to","approval","short_description","active","state","priority","risk","start_date","end_date","type","work_end","work_start","approval_history","approval_set","business_service","category","u_change_type","std_change_producer_version","close_code","closed_at","cmdb_ci","impact","location","opened_at","phase","requested_by","service_offering"},{"u_subcategory","number","company","u_service_profile","assignment_group","assigned_to","approval","short_description","active","state","priority","risk","start_date","end_date","type","work_end","work_start","approval_history","approval_set","business_service","category","u_change_type","std_change_producer_version","close_code","closed_at","cmdb_ci","impact","location","opened_at","phase","requested_by","service_offering"}),

in

    #" Expanded Value1"

any help would be greatly appreciated.

Thanks