Fortigate VM Unreachable for SSL VPN, but can setup IPSEC Tunnels

I am having challenges with connecting (or setting up) a SSL VPN on my Fortigate VPN on Google Cloud.

I have had success setting up some site to site IPSEC tunnels without issue.

I have some experience setting up SSL-VPN tunnels outside of this. But right now when I set it up and try to connect it does not appear to reach the Fortigate. When I initiate connection it stops at 10%

Help! Been struggling with this for a few days.