My server uses https connection. According this error seems that certificate of course has not localhost written in it:

requests.exceptions.SSLError: HTTPSConnectionPool(host='localhost', port=443): Max retries exceeded with url: /mailman3/api/ templates/list/example.com/list:user:notice:welcome (Caused by SSLError(CertificateError("hostname 'localhost' doesn't match either of 'listserv.example.com', 'example.com', 'www.example.com ",),))

Second question, is archiver template example: $hyperkitty_url: Permalink to archived message in Hyperkitty

If to set as in the example, then it add " : " to the end of the line, and link does not work. I would recommend to update it.

My question is: My server's address is listserv.example.com, but mailman to email message variable $hyperkitty replaces like https://example.com/.... What does then happen? https://example.com does not point to my web interface address. I have resolved it with the Apache2 redirection tools, but is it possible to set it correct in mailman's configuration?

Kind regards Ugnius