salt-api rest_cherrypy sslobj.do_handshake

Description
I can not start salt-api service properly. There seems to be a problem with the certificate.
I've generated cert using: salt-call --local tls.create_self_signed_cert

Setup

rest_cherrypy:
  port: 8000
  ssl_crt: /etc/pki/tls/certs/localhost.crt
  ssl_key: /etc/pki/tls/certs/localhost.key

Traceback

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cherrypy/wsgiserver/__init__.py", line 2021, in start
    self.tick()
  File "/usr/lib/python3/dist-packages/cherrypy/wsgiserver/__init__.py", line 2090, in tick
    s, ssl_env = self.ssl_adapter.wrap(s)
  File "/usr/lib/python3/dist-packages/cherrypy/wsgiserver/ssl_builtin.py", line 66, in wrap
    s = self.context.wrap_socket(sock,do_handshake_on_connect=True,
  File "/usr/lib/python3.8/ssl.py", line 500, in wrap_socket
    return self.sslsocket_class._create(
  File "/usr/lib/python3.8/ssl.py", line 1040, in _create
    self.do_handshake()
  File "/usr/lib/python3.8/ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()

Versions Report

Salt Version:
           Salt: 3001.1
 
Dependency Versions:
           cffi: Not Installed
       cherrypy: unknown
       dateutil: 2.7.3
      docker-py: Not Installed
          gitdb: 2.0.6
      gitpython: 3.0.7
         Jinja2: 2.10.1
        libgit2: 0.28.3
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.6.2
   mysql-python: Not Installed
      pycparser: Not Installed
       pycrypto: 2.6.1
   pycryptodome: 3.6.1
         pygit2: 1.0.3
         Python: 3.8.5 (default, Jul 28 2020, 12:59:40)
   python-gnupg: 0.4.5
         PyYAML: 5.3.1
          PyZMQ: 18.1.1
          smmap: 2.0.5
        timelib: Not Installed
        Tornado: 4.5.3
            ZMQ: 4.3.2
 
System Versions:
           dist: ubuntu 20.04 focal
         locale: utf-8
        machine: x86_64
        release: 5.4.0-1026-azure
         system: Linux
        version: Ubuntu 20.04 focal