I know this is an old post. But I had this problem with the last HA update. I found a solution:
The problem is caused by a conflict in the ports
- Stop all your containers except Portainer and HA + HA supervisor
- Check if that solved your problem. If so… continue to point three.
- Activate one of your Docker containers and check if the problem persist.
- Repeat number three until you find out which one is the container that is conflicting with HA.
- When you find it, just stop the container and change the ports in which the container is running.
- enjoy.