Authentication Issue with Mautic 2.8.1

I am able to authenticate using basic username and password on a Mautic 2.15.2 installation; however, I am NOT able to do the same on a Mautic 2.8.1 version.

Strangely enough, there’s a similar challenge using the API method.

I think the issue that you’re seeing repeatedly mentioned might be related to Mautic versions and how you’re authenticating. FYI — Many people have ‘paused’ at Mautic 2.8.1 because of various integrations being broken with the latest versions (Thrive Leads, etc).