3361041 - Time out when trying to open any Agent Administration related step - SAP Solution Manager

• Access to Agent Administration is not possible due to a time out error
• Access to step '2.3 Diagnostics Agent Authentication' in Infrastructure Preparation of SOLMAN_SETUP is resulting in time out
• Access to 'Assign Diagnostics Agent' in the Managed System Configuration is resulting in time out

The error message says:

"500 Connection Timed Out 

Timeout occured"

SAP Solution Manager 7.2

timeout occurred, agent admin, time-out, time out, DAA, all agents are offline, agent admin not reachable, SMDAgent, SMD Admin , KBA , SV-SMG-INS-DIA , Configuration of Root Cause Analysis related infrastructure , SV-SMG-DIA , Diagnostics , Problem