Failed to connect to supervisor port 80 after 0 ms: Couldn't connect to server

[Timon321]

i updates my environment from Debian 11 to Debian 12.
Now he cant find my Home Assistant Mosquitto Broker.
But the broker is running fine.
Here is my log:

s6-rc: info: service s6rc-oneshot-runner: starting
s6-rc: info: service s6rc-oneshot-runner successfully started
s6-rc: info: service fix-attrs: starting
s6-rc: info: service fix-attrs successfully started
s6-rc: info: service legacy-cont-init: starting
s6-rc: info: service legacy-cont-init successfully started
s6-rc: info: service legacy-services: starting
s6-rc: info: service legacy-services successfully started
curl: (7) Failed to connect to supervisor port 80 after 0 ms: Couldn't connect to server
[15:50:09] ERROR: Something went wrong contacting the API
[15:50:09] FATAL: No internal MQTT Broker found. Please install Mosquitto broker.
s6-rc: info: service legacy-services: stopping
s6-rc: info: service legacy-services successfully stopped
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped

[Morgaroth]

Hello I have the same issue

I found that it might be caused by lack of network capability, like here home-assistant/supervisor#4396

so I opened, @ttvt please take a look
#82