In ClearScada, while connecting to Server Status or Configuration from the Server Icon, getting message ‘Failed to connect to server, no connection could be made because the target machine actively refused it’.

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This message comes when the Default Server Port (i.e. 5481) doesn’t match with what is configured in Server Configuration (Server Configuration > Global Parameters > Advanced > Server Port).
Below is the work around:

Open and Logon to the ViewX Client, Under Home Tab, Click Status and check the Port set under Node Tab (LocalHost:5481).
After that open the ‘Configure Connections’ (Start Menu > Schneider Electric > StruxureScada Expert > ClearScada > Configure Connections). Go to Properties > Advanced > Set the Server Port to 5481 and save this configuration.