Mail File Attachment

I am trying to attach a file in the MAIL of CONTACT FORMS 7 to send to people who fill out my form.

My file: http://www.tutordoctormiami.com/wp-content/uploads/2019/04/Welcome-Letter-TD-Miami-1.pdf

In the MAIL-FILE ATTACHMENT I have tried multiple variations:
[http://www.tutordoctormiami.com/wp-content/uploads/2019/04/Welcome-Letter-TD-Miami-1.pdf]
[uploads/2019/04/Welcome-Letter-TD-Miami-1.pdf]
[file http://www.tutordoctormiami.com/wp-content/uploads/2019/04/Welcome-Letter-TD-Miami-1.pdf%5D

And none send the file with the outgoing email.

I have thoroughly reviewed the https://contactform7.com/file-uploading-and-attachment/ and searched this forum but I still do not have an answer. Perhaps anyone can help me with very specific instructions.

PS: WordPress and Contact Form 7 have been updated to latest version.

The page I need help with: [log in to see the link]