Fiz uma recarga no intuito de comprar creditos, porem na hora de autenticar, apareceu esse erro e não carregou mais.
I was finalizing the payment, when I was asked for two-step authentication by sending an SMS, however, it shows an alert with the following sentence:
"There was an unexpected mistake. Reload the page and try again.".
I'm Brazilian, I've changed browsers, put private mode, tried also on my cell phone and nothing worked.

