I had that error in the past as well and it turned out my password was typed incorrectly.
Try installing it again and pay close attention to the password.
Hope it works for you.
I am receiving this same error message but I am not being prompted for a login ID or password. The error occurs when I click on the SmartConnect applicaitn icon.
Can you please check the event log on the machine where SmartConnect is running and let me know what error messages are in there?
There should be more information under Application and Service Logs/SmartConnect.
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