We're getting 210 errors with a message "Error while processing URL"
By default, we shorten the URL every time with the standard goo.gl service. Seems to be that this service is unable to shorten your URL.
In order to fix it, you should add the "minimize_link": 0, parameter to your request or try the 2 value.
You can find more detailed information in our Guide:
"minimize_link": 0, // optional. False or 0 — do not minimize, 1 — Google, 2 — bitly. Default = 1