Hello, I have actually also been having this same issue and tried the items you recommended with disabling “Enable PayPal Smart Checkout”?enabled check mark. I just cant seem to get the buttons to show up at all.
I have made sure to check the box on the general setting to disable the standard paypal, and have the box checked on the PPCP page and was also able to generate an API key for the live site.
Anything else you can recommend?