Deep link to Invoice attachment in Approval Email Notification is not working

Summary: We are trying to add a link to the Invoice attachments in the PPR approval notification. But the link is not working and an additional URL of the instance is appended to my link.

I have derived the link in the datamodel and added a hyperlink in the RTF.

Content (required):

We are trying to add a link to the Invoice attachments in the PPR approval notification. But the link is not working and an additional URL of the instance is appended to my link.

I have derived the link in the datamodel and added a hyperlink in the RTF.