OLE OBDC error: help interpreting auto generated error query

Not sure it helps or not, but here is the M-Code for the query that is failing to load. Not terribly complex. For each server there is a function that is called. The function takes an arguement for the data type to query from the REST endpoint.

let
    //join the server code query with the project data type query
    #"Added Custom" = Table.AddColumn(lst_ServerCodes, "ProjectAdminDataType", each lst_ProjectDataTypes),
    //expand the data types column to create a cross-join
    #"Expanded ProjectAdminDataType" = Table.ExpandTableColumn(#"Added Custom", "ProjectAdminDataType", {"ProjDataTypes"}, {"ProjDataTypes"}),
    // change the type on the new column
    #"Changed Type" = Table.TransformColumnTypes(#"Expanded ProjectAdminDataType",{{"ProjDataTypes", type text}}),
    //execute custom function to iterate through each server and data type to get data
    #"ExecuteFunction" = Table.AddColumn( 
        #"Changed Type",
        "AdminData",
        each Function.Invoke(    
            Expression.Evaluate(
                "FnAdminQuery"&[ServerCodes],
                #shared
            ),
            {[ProjDataTypes]}
        )
    )
in
    ExecuteFunction