Mollie + Gravity Form issue

We have a error that says:

‘Your Mollie profile doesn’t have any payment method that supports Euro. You need to add a payment method that supports the currency in your Mollie Profile or change your Currency Setting.’

Mollie support has shown is there are no currency issues and all payment solutions support Euro.
It looks like Locale or something is causing the issue. We have made payments before and they worked. So why this is causing an issue is weird.

Does anyone know a solution?