License request - activation - error

I can not send request for the license:
“Error 0: An unknown error occurred. It is possible that a browser addon blocks sending the request to “license.univention.de””

when I try to open site
https://license.univention.de/
503 Service Unavailable
page is not loading
is there a global problem?

is there another way to obtain license file?Zrzut ekranu z 2022-02-01 13-31-58
Zrzut ekranu z 2022-02-01 13-31-43

it’s working now, so there was a problem with the site

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