This guy says he has been trying to buy a premium membership since yesterday. He says that every time he tries to pay with Paypal, he gets the message that it's not possible at this time.
Premium Mitgliedschaft

Es wird besser wenn Sie an Help and Support schreiben.
https://support.chess.com/customer/portal/emails/new

Hello Brunnsteiner. If you are having problems upgrading to Chess.com through Paypal then what you can do is manually send your payment to "order@chess.com" Paypal email address including a note with your username and what you are purchasing. Thank you for your support of Chess.com.
Hallo Brunnsteiner. Wenn Sie Probleme haben, das Upgrade auf Chess.com über Paypal dann, was Sie tun können, wird manuell senden Sie Ihre Zahlung an "order@chess.com" Paypal E-Mail Adresse mit einer Anmerkung mit Ihrem Benutzernamen und was Sie kaufen. Vielen Dank für Ihre Unterstützung von Chess.com.

And in breaking news, German grammar and syntax have been shot yet again by google translate.
They are currently on the ground, bleeding, and it is unclear at this point if a recovery from this is possible.

And in breaking news, German grammar and syntax have been shot yet again by google translate.
They are currently on the ground, bleeding, and it is unclear at this point if a recovery from this is possible.
I think it's perfectly comprehensible. That is the point, isn't it?
Man kann es verstehen. Nichts?
Hello Brunnsteiner. If you are having problems upgrading to Chess.com through Paypal then what you can do is manually send your payment to "order@chess.com" Paypal email address including a note with your username and what you are purchasing. Thank you for your support of Chess.com.
Hallo Brunnsteiner. Wenn Sie Probleme haben, das Upgrade auf Chess.com über Paypal dann, was Sie tun können, wird manuell senden Sie Ihre Zahlung an "order@chess.com" Paypal E-Mail Adresse mit einer Anmerkung mit Ihrem Benutzernamen und was Sie kaufen. Vielen Dank für Ihre Unterstützung von Chess.com.
I had the same problem and followed your instructions. Unfortunately nothing happened the last days. Could you please look into my case and solve the problem?
Thank you
Seit gestern versuche ich immer wieder eine Premium-Mitgliedschaft zu buchen. Immer wenn ich dann per paypal bezahlen möchte, erhalte ich die Mitteilung, dass dies zur Zeit nicht möglich ist.
Karlheinz Weber