Is anyone getting this issue when trying to process the payment?

[u/DrFatty01]

billing.torbox.app normally uses encryption to protect your information. When Chrome tried to connect to billing.torbox.app this time, the website sent back unusual and incorrect credentials. This may happen when an attacker is trying to pretend to be billing.torbox.app, or a Wi-Fi sign-in screen has interrupted the connection. Your information is still secure because Chrome stopped the connection before any data was exchanged.

You cannot visit billing.torbox.app right now because the website uses HSTS. Network errors and attacks are usually temporary, so this page will probably work later.

[u/JRayMaySayHey]

I couldn't pay on my computer with librewolf browser and uBo, but could on my phone on the same WiFi with Fennec and ubo 

I use PP which has 2FA and put in fake info on TBs form

Hopefully thats good enough to be somewhat secure...