I was working on some queries and then my HeidiSQL froze, I tried to reboot the connection and I get good old MYSQL Error (2003) (10060). It worked just fine before that.
I haven't made any firewall changes, and I checked the "white list" of IPs on AWS it still was fine. I encountered this error code before but never during work with no changes.
I turned OFF firewall and still same error
It works all of a sudden, but I would like to know why such thing happened. Connection issues?