Camunda Modeler Unknown Error

I have Camunda deployed to EKS. Everything is working except when I try to deploy with Camunda Modeler. Zeebe gateway is behind an Application Load Balancer. When I put in my address and port to Camunda Modeler I get Unknown error. Please check Zeebe cluster status.

image

I can run zbctl status with the same address and port and it comes back fine. sudo zbctl --address zeebe.mydomain.com:26500 status

And in fact I can successfully deploy via zbctl.