Icinga2 not reachable from Browser

installing and configuring all the prerequisites according to the guide (Ubuntu - Icinga 2),
I still cant access the server by its ip address (http://ip-address/icingaewb2/setup) from my browser to continue the set up.

The server is hosted on an AWS EC2 instance

informations about the server:
the icinga2 version: r2.13.2-1
Enabled features: api checker icingadb ido-mysql ido-pgsql mainlog notification

dont forget to install icingaweb2