Hi Rachev,
I followed same steps what you mentioned created 2 groups and attached Polies( roles ) to the corresponding groups and then I created user and attached created group the newly created group.
I used key Access Key and Secret Key associated with new user in SAP Cloud Appliance Library to create new account I am still get same error
"An error occurred; contact your SAP Cloud Appliance Library operator" when I click NEXT button
any thing missing my side.
Note : AWS account is Free account which is was activated with valid card details
Your feed back will be appreciated
Thanks
Umashankar Boga