Error with Supervisor

I have tried to access my add-on page, but I get a error message. When I click through, I get this:
On advice on how to fix it?

Logger: homeassistant.components.hassio.handler
Source: components/hassio/handler.py:560
Integration: Home Assistant Supervisor (documentation, issues)
First occurred: 16:50:00 (25 occurrences)
Last logged: 17:07:33

Client error on /info request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed (‘172.30.32.2’, 80)]
Client error on /host/info request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed (‘172.30.32.2’, 80)]
Client error on /backups request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed (‘172.30.32.2’, 80)]
Client error on /os/info request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed (‘172.30.32.2’, 80)]
Client error on /supervisor/info request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed (‘172.30.32.2’, 80)]

Open a SSH shell, enter

HA supervisor restart
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