Can't Start RPA Designer after installation - continue refresh

Hi all, after the installation of RPA (trial version - a green hook everywhere) i would like to start RPA-Designer with "https://127.0.0.1:8445/oo-designer".

After a return in firefox the browser refresh the site continuously.

After a return in IE i get the Error "HTTP 404 - Site not found".

What is the problem here?

Regards

Torsten