Communications link failure SSH Tunnel on Datagrip

I need to connect RDS through SSH for now(Local -> EC2 -> RDS). So I tried to connect MySQL via SSH Tunnel option on Datagrip, however, It cannot connect to server.

[08S01] Communications link failure  The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. No appropriate protocol (protocol is disabled or cipher suites are inappropriate).

I tried MySQL Workbench with Standard TCP/IP over SSH option. It works well. Is that different between TCP/IP over SSH and SSH Tunnel? Or Did I something wrong? This is my workbench screenshot. It works. This is my Datagrip screenshot. I wrote host as RDS endpoint but it failed.