It looks like this could be a different issue from the PowerPoint Add-in one. Could you please raise a support ticket? I'd recommend using the "Email support" functionality under "Add-in Help" in the ribbon so that all the technical information is automatically prepopulated.
Apologies for the inconvenience.
Magali Pelissier, Product Manager - Extensions (Excel Add-in, PowerPoint Add-in, Google Sheets Add-on) Check out our dedicated Community page in the Platform section!