Text Tag to Create a Field for Signer to Upload Supporting Documents Does Not Work

Hello, 

I am having trouble using the Adobe Sign Text Tags to create a field to allow the signer to upload supporting documents.  

 I created a test form using code from the linked resource provided, 

https://helpx.adobe.com/sign/using/text-tag.html,

however the "attachment" text tag did not work (no form field appeared) but the signature form field appeared.   So I am thinking I can insert the code properly in the form as the signature field worked, but that the code for the signer to upload a document is not working?

Here is the sample:

Please upload your scanned copy of your driver’s license: {{*DriversLicense_es_:signer1:attachment}}And sign here: {{Sig_es_:signer1:signature}}

Can someone or Adobe tell me  if the code is correct? or perhaps it has changed for the receiver/signer to upload supporting documents? Or perhaps I am inserting the code improperly? 

I am using Adobe Acrobat Pro DC Version 2020.013.20074.

Thanks, Linda