Paypal is not enabled. Argentine Pesos and United States Dollars.

Hi! I hope you can help me.
My main currency in the store is Argentine Peso.
When I want to enable PAYPAL as a payment method, it indicates the following error:
“Gateway disabled: PayPal Standard does not support your store’s currency.”

Then, install this plugin and put both ARS and USD, and I saved the changes.
Despite this, the error keeps popping up.
What I can do?
It’s like it doesn’t recognize that both currencies already exist.

Thanks.