After going to Software > App Center > ownCloud > Install, I get this error:
An error occurred
Could not fulfill the request.
Server error message:
There is a problem with the certificate of the App Center server https://appcenter.software-univention.de. ([SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581))
Can I please get some assistance on this? Any help (in English, please) would be greatly appreciated. Thank you!