SSL Verification failed


i got this error. The Renewing for certificates i already did. It didnt solve the Problem:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/", line 280, in execute
    result = execute(umc_module, **kwargs)
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/plugins/", line 286, in run
    cert_verify = list(verify_local(all_certificates))
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/plugins/", line 260, in verify_local
    for error in verifier.verify(cert):
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/plugins/", line 206, in verify
    for error in self._verify_timestamps(cert_path):
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/plugins/", line 165, in _verify_timestamps
    with open(cert_path) as fob:
FileNotFoundError: [Errno 2] Datei oder Verzeichnis nicht gefunden: ''


Second or Third DC are not joined after this error. I found this Error while installed a new memberserver, but it cant join.

i dont know why and how and how i can solve this.


Is port 80 opened for access from internet?

Its without Letsencrypt. I only use selfsigned Root Certificate of the server. Do i need P80 for selfsigned?

The less information, the less help is possible.

Which certificate do you want to renew - the root certificate or the server certificate?
The server certificate is self-signed, too?
What is the Univention server version?

In the Past all my univention servers got SSL Certificates from my Reverse Proxy via acme and rsync to a location and entry in ucr variables.

Yesterday i removed the apache2 entries with my certificate of my reverse proxy rollout to all servers, cause the Univention Server no need a certificate now.
So i renewed the Root certificate and only want use selfsigned certificate for the Servers and used the documentation of: Renewing the SSL certificates

Version: 5.0-1 errata310.