CRM_UI transaction leads to 'page cannot be displayed' error in browser

Hi,

CRM_UI isn't working in our CMR 7.0 EHP3 ABAP system.

Already activated all sub-services as per Notes 1115493 , 1295006 with no luck. No issues with Hostnames, FQHN etc found. Any ideas to troubleshoot further?

Regards,

Naga