Get data from web error - Expression.Error: There weren't enough elements in the enumeration to comp

Hello, I'm trying to get data from a table of URLs (for different stocks). Please see attached file.

I've created a connection using one URL and then tried to get data from the table of URLs. I'm encountering the below error while the query is downloading:

Expression.Error: There weren't enough elements in the enumeration to complete the operation

Below are the codes in the Advanced Editor:

let
Source = Excel.CurrentWorkbook(){[Name="URL_Annual"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Ticker", Int64.Type}, {"URL_Annual", type text}}),
#"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each fxOther_Annual([URL_Annual])),
#"Expanded Custom" = Table.ExpandTableColumn(#"Added Custom", "Custom", {"Column1", "Column2", "Column3", "Column4", "Column5", "Column6", "Column7"}, {"Custom.Column1", "Custom.Column2", "Custom.Column3", "Custom.Column4", "Custom.Column5", "Custom.Column6", "Custom.Column7"})
in
#"Expanded Custom"

Would someone be able to help with this error please?

Thanks very much!