It seems like we cannot more than one listener et an AWS Network Load Balancer.
I've a Load balancer already listening for HTTPS/TLS on port 443. As my instances behind also support http some vhost, I would like to add new HTTP/80 listener to the load balancer, but when I try, I can available target groups depending on protocol (TCP, or HTTP), but one I select the target of the listener, the add button remains grey, so I can't add neither a new HTTP listener nor a TCP listener to my load balancer.
It's been a while that I didn't build on AWS, did I miss something?

