Cloudflare installation problem

Hi, I’m having some problem to install cloudflare integration.
here below the log of the integration.
The integration is not able to connect to the server.

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
cont-init: info: running /etc/cont-init.d/00-banner.sh
curl: (7) Couldn't connect to server
[05:29:11] ERROR: Something went wrong contacting the API
cont-init: info: /etc/cont-init.d/00-banner.sh exited 0
cont-init: info: running /etc/cont-init.d/01-log-level.sh
curl: (7) Couldn't connect to server
[05:29:11] ERROR: Something went wrong contacting the API
cont-init: info: /etc/cont-init.d/01-log-level.sh exited 0
s6-rc: info: service legacy-cont-init successfully started
s6-rc: info: service init-cloudflared-log: starting
s6-rc: info: service init-cloudflared-log successfully started
s6-rc: info: service init-cloudflared-config: starting
[05:29:12] INFO: Checking Add-on config...
[05:29:12] FATAL: 'external_hostname' is empty, please enter a valid String
s6-rc: warning: unable to start service init-cloudflared-config: command exited 1
/run/s6/basedir/scripts/rc.init: warning: s6-rc failed to properly bring all the services up! Check your logs (in /run/uncaught-logs/current if you have in-container logging) for more information.
/run/s6/basedir/scripts/rc.init: fatal: stopping the container.
s6-rc: info: service init-cloudflared-log: stopping
s6-rc: info: service init-cloudflared-log 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`

Any idea how to resolve …