How to donate from a country where Paypal's "donate" is not activated

I've been an OMV user for several weeks and feel happy with the functionalities.

OMV has solved my ten-year problem and provided flexibility to my system.

I want to demonstrate my thanks, but Paypal doesn't permit me to "donate" the project from my country.

Is there any problem if I send the little money directly to paypal@openmediavault.org via Paypal instead?

Yes, I have, but "Donate with a Card" is also handled by Paypal, and unfortunately, I got the same result.

I don't think "Donation" has extraordinary things in Japan, but I cannot use Paypal's donate feature. Strange.