Can’t pay without paypal account

Hi,
I’ve got an issue with your plugin and paypal checkout landing page.
I’ve set up the checkout style from Yith plugin settings to Billing. But you can’t pay an order without an account or creating one.
You land to a paypal page where you can put your credit card details and billing address but at the end of the form you should have : Create a paypal account ? Yes / No | Pay button.
Instead you have : Open a paypal account, and the fields are required so you can’t just leave them blank and place order.
It seems to work fine with sandbox.
Also if you do that on Chrome incognito mode you get to the paypal login landing page.
Do you have any ideas why is that so ? It is really important to let customers pay without a paypal account if they don’t want one.

Thanks,
Cecile