Hi Ventstislav,
Btw I just noticed that the "timeout error" with an orange quadrilateral comes only when I click on the "Check" button. When I click on Cookie Domains and click back on Access Control, the connection is shown as green.
The only way to check if its really green is to see if a call to a BAPI happens from an HTML5 app on HCP via the cloud connector. I will confirm that and let you know. If indeed this is the case then the SCC UI might be the one having a bug.
Regards
Suneet