Message was not downloaded, because you are not connected to the server

using free version, latest 7.2.36908.0.
I have 2 accounts in client but I have a problem. If I open EM client, can’t read new mails. I see message about I’m not connected to the server. 

But I’m online, internet works fine. Everytime I must to close EM client and reopen it, then it works fine again.

Any idea how to fix that please?

Try disabling your anti-virus/firewall application and see if there is any difference.