Telegram Channel Error: invalid URL

I just tried it. Looks got, but still the same error inside Zammad.

Loading production environment (Rails 7.0.8.1)
[1] pry(main)> TelegramHelper.check_token('6955123822:AAEOmSSBxxxbKLUhVP6sJyH-hjWjZsxxxCc').id
=> 6955755123
[2] pry(main)> Setting.get('http_type')
=> "https"
[3] pry(main)> Setting.get('fqdn')

=> "zammad.my-domain.de"