HA The backup firewall is not accessible (check user credentials)

[Igor]

Hi.
(Following this thread), to fix this here I reconfigured:

On Master:
- System > High Availability > Settings = Synchronize Config = 10.0.0.2:443  # added the :443, 10.0.0.2 = backup
- System > Settings > Administration = Listen Interfaces: All (recommended)

On Backup:
- System > Settings > Administration = Listen Interfaces: All (recommended)