Why can't I pay with Paysafecard at Microsoft?

For some reason the three payment methods are grayed out. My problem now is that I'm sitting here with a Paysafecard without being able to pay. Is there any way to unlock that? (Wanted to get the Xbox Game Pass for 1 euro)

I think you have to add a paysafecard account as a payment method

The Game Pass (also for one euro) is a subscription and can therefore only be used with the appropriate payment methods.

Just use PayPal, it works with it.