When you are creating your SAP HANA connection are you specifying a port as well? This error was happening to me because the connection creation interface wasn't very specific about the need to include a port. Once I did, the issue appeared to resolve. So, when prompted for the "server" express it like this: <servername>.<domain>.<com/net>:<port>
I'm not sure if it's a standardized thing or not, but if you just know the server name and instance number (say your instance number is "02") then your port may look something like 30215 or "3<instanceNumber>15". Otherwise maybe just try the default port of 30015.
Hope that helps.