Hello,
I am an independent advisor, and I am trying to help other users in Community with my experience in Microsoft products.
When you are trying to use a method/property that does not belong to the object. For instance, if you have a Workbook object and try to access the Range property, it will give you the 438 error since the Range property belongs to the Sheets object.
Try without http//.
Do let me know if you require any further help on this. Will be glad to help you.
Thank you