Error while using License Server behind LoadBalancer

I have successfully installed license server on an ECC2, but now I am trying to get it behind AWS ALB --> Route53 DNS, don't have to depend on dynamic private IPs. But getting this error:

ERROR: The license is invalid: Failed to get floating license. Reason: Failed to create HTTPS service for floating license server.

Is this even allowed? its port ALB port 80 --> TG port 80 and usage in CI pipeline: `readyapi.xxxx.route53dns.xxxxxx:6443` 

Can someone please help. For helthcheck I had to install nginx