The possible system irregularity affecting premium billing has been resolved and billing is working as expected.
Apr 12, 19:27 UTC
Developers may experience the error following when configuring billing, we are actively investigating and will update as soon as we know more
Error getting payment method
Internal error occurred. Message: Internal error, Code: 131
Apr 12, 17:13 UTC
The Twitter data team is investigating a possible system irregularity currently affecting the premium billing configuration here https://developer.twitter.com/en/account/billing
on the billing page. The presence and scope of any customer impact have not been determined at this time, but we will provide an update as soon as we know more.
Apr 12, 17:09 UTC