Chatterbug Website Bug Report: Can't add new payment method.

add_payment_bug.txt

hallo. wir haben ein kleines Problem. I can't add a new payment method.

# Setup

## Chatterbug web UI language setting: DE (that's also the lang I'm learning of course)

## Browsers (I've tried two, same result, so I didn't try Firefox): 

* Google Chrome Version 73.0.3683.86 (Offizieller Build) (64-Bit) (some extensions installed, but I've already tried disabling the one that I suspected might interfere - "Disconnect")

* Safari Version 12.1 (13607.1.40.1.5) (No extensions installed)

## OS: Mac OS X 10.13.6 (17G5019)

I have one credit card already entered. it is visible on the "Zahlungen/Payments" page.



# Steps to Reproduce

0. visit https://chatterbug.com/payments

1. click "add new payment method"

2. See dialog appear. Enter credit card.

3. Click "Add payment source" button.



# Result

## Expected: New card should appear.

## Actual: dialog disappears and nothing happens. New card does not appear. old card is still there.