Amazon Echo SmartJ Binding issue with Account Login

Hi,

I am having a problem with getting the Amazon Echo Control binding I installed it via the Webinterface:

(This is the latest available version right? Or is there something else/newer to find somewhere?)

But when trying to access the url: myopenhabinstallation:8080/amazonechocontrol

Then I get this:

What could have gone wrong? What should I try next to make it work?.

Any recommendations @J-N-K ? Or anyone else?

For me it works fine. Is there anything in the logs? Did you try clearing cache or another browser?