Anyone else has a problem buying on Itch via PayPal? Maybe you can put your games somewhere else like GOG or DLsite or Jast USA? BlIts is also doing payments via their own site and then send games and updates via email. That also may be a good option. Buying DRM versions on Steam is not a good option, we all see why, games being removed etc.
I'm sorry. Contact through the email here and I can sell you an Itch code via Paypal: https://ypressgames.com/contact/ Seems like this is a new problem now.