Signal messenger / unknown error

Hello,

I try to intigrate signal to my HA.
Set a new phone number acc. to signal-cli-rest-api/doc/HOMEASSISTANT.md at bb246cf3f7e786822a910194ba6f62cc2015e78c · bbernhard/signal-cli-rest-api · GitHub

config:
config

acc to the signal protocoll, signal runs:
signal start

try to send a message:

result unknown error.

Can someone please help?
Does anybody have an idea about the reason it doesn’t work?

additional info I found in the log flie:

+491xxxxx (#The number I like to send message): CAPTCHA proof required for sending to “+491xxxxxxx”, available options “CAPTCHA” with challenge token “f988262f-3759-xxxxxxxxxxxxxx”, or wait “86400” seconds.
To get the captcha token, go to https://signalcaptchas.org/challenge/generate.html
After solving the captcha, right-click on the “Open Signal” link and copy the link.
Use the following command to submit the captcha token:
signal-cli submitRateLimitChallenge --challenge CHALLENGE_TOKEN --captcha CAPTCHA_TOKEN

I´ve done the above mentioned steps and put the signal-cli submitRate.... in the HA terminal box.
→ zsh: command not found: signal-cli

Fixed the issue of registering, See my article: HA OS Signal Integration