OAuth2 Authorization Code Flow No Longer Works

[AvromFinkelsteinF]

Hi,

I'm using authorization code flow for authorization.

The URL that I'm using for a browser is:

https://authz.constantcontact.com/oauth2/default/v1/authorize?client_id={myClientID}&scope=contact_d...

The redirect uri matches what was set up in the application.

This used to work up until at least a few months ago.

Now, I get the following where it shows "Unable to sign in" with no error message:

And it remains in this state indefinitely.

[John__B]

Hello AvromFinkelsteinF,

Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.

It looks like we've already followed up with you directly via email, but I wanted to close the loop here as well. If you haven't received our reply, please let us know via email at webservices@constantcontact.com, and reference case number 31200930.

Regards,