Only being able to establish a VPN in one direction is usually the result of a configuration error.
Unfortunately, you haven't told us much about the configuration you have.
So far, all I know is you have an on-premise Check Point gateway.
What version?
How is it exactly configured?
What are you connecting to on the remote end? (AWS directly? A Check Point instance?)
What troubleshooting have you done?
What log messages have you seen?
Maybe also look at: https://community.checkpoint.com/docs/DOC-3023-vpn-troubleshooting-commands