Hi Jwala,
Thanks so much for reaching out!
You can check the status of the server by heading to Events Settings < Help and scrolling down to Event Aggregator System Status.
Does it say that the server is connected? Do you see any other error messages of note there?
If the server does seem to be connected, try running your import again and let me know what happens. If the server does not seem connected, let’s start by checking that the Event Aggregator is connected to your current license key. See My Account » Licenses to find your current key.
You may want to also just manually re-enter the license key, even if it is correct, and ‘Save Changes’.
Let me know how it goes!
Thanks,
Jaime