How to generate certificates via pyopenssl so that the browser issues a secure connection?

Question

Python

If I generate certificates directly via openssl, everything is OK and everything works fine for me and the browser does not swear. I do everything according to this article ( https://habrahabr.ru/post/192446/)
If I generate via pyopenssl, then the browser swears, Chrome gives out that the site cannot provide a secure connection ERR_SSL_SERVER_CERT_BAD_FORMAT,
and Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL
I generate, as in see this article ( xazrad.blogspot.ru/2014/11/python-ssl.html)
It seems that nothing special is happening here, but I can’t understand why everything is ok with openssl, but with pyopenssl it’s such a crap.
PS sha1 to sha256 tried to change

Answer 1

The issue was resolved, it was necessary to separately create a request and after that create a certificate