PDF Upload Button not Showing Up in Whiteboard

I'm a veteran Zoom user for my Math and Physics Teaching Company...and I'm THRILLED to see we can finally upload pdfs. 

I'm the only account holder, thus the admin. I have made sure the toggle is set to allow me (and my students) to upload pdfs and images, etc. to whiteboard. 

HOWEVER - the option is simply NOT showing up in my whiteboards in meetings. I have restarted my mac, I have quit and restarted Zoom. I am logged in.  (Zoom 5.16.6)

Both Zoom and Mac are current. 

HELP! I'm losing it!