Did you maintained the ports in the profiles ? without that informations the server will not listen.
Please check in transcation RZ10 the instance profile and the parameter :
| icm/server_port_0 |
if initial please try
icm/server_port_0 = PROT=HTTP,PORT=80$$
Then check following parameteres and add if initial:
login/accept_sso2_ticket = |
1 |
| login/create_sso2_ticket = | 2 |
| icm/host_name_full = | hostname.domain |
Please do not try on production. After modifing profiles you have to restart the instance to activate the changes.