Error but nor error when refreshing Sharepoint connection

Hi everybody!

I am experiencing a weird error that I can neither explain nor get rid of. I am connecting to a Sharepoint folder and append a couple of files. This works wonderfully. The issue is that, everytime I refresh my connections, I get the following error:

The good news is that everything works perfectly despite the error message. All records are imported, all numbers add up.

The bad news is that this will scare other users. Hence it needs to go away.

What is weird about this error that no errors actually exists. There is no column in Power Query that contains the value "Error".

Consequently, the "Table.SelectRowsWithErrors" function yields an empty table (see picture below).

This is the code for the sharepoint folder connection:

let
    Source = SharePoint.Files("[Url removed]", [ApiVersion = 15]),
    #"Removed Columns" = Table.RemoveColumns(Source,{"Extension", "Date accessed", "Date modified", "Date created", "Attributes"})
in
    #"Removed Columns"

And this is the code for the error query:

let
Source = #"SharePoint Folder",
  #"Detected Type Mismatches" = let
    tableWithOnlyPrimitiveTypes = Table.SelectColumns(Source, Table.ColumnsOfType(Source, {type nullable number, type nullable text, type nullable logical, type nullable date, type nullable datetime, type nullable datetimezone, type nullable time, type nullable duration})),
    recordTypeFields = Type.RecordFields(Type.TableRow(Value.Type(tableWithOnlyPrimitiveTypes))),
    fieldNames = Record.FieldNames(recordTypeFields),
    fieldTypes = List.Transform(Record.ToList(recordTypeFields), each [Type]),
    pairs = List.Transform(List.Positions(fieldNames), (i) => {fieldNames{i}, (v) => if v = null or Value.Is(v, fieldTypes{i}) then v else error [Message = "The type of the value does not match the type of the column.", Detail = v], fieldTypes{i}})
in
    Table.TransformColumns(Source, pairs),
  #"Added Index" = Table.AddIndexColumn(#"Detected Type Mismatches", "Row Number" ,1),
  #"Kept Errors" = Table.SelectRowsWithErrors(#"Added Index", {"Content", "Name", "Folder Path"}),
  #"Reordered Columns" = Table.ReorderColumns(#"Kept Errors", {"Row Number", "Content", "Name", "Folder Path"})
in
  #"Reordered Columns"

Does anyone have any idea?