So you access SABnzbd via
https://127.0.0.1:8080/ ? And, with Chrome, you get:
"Your connection is not private
Attackers might be trying to steal your information from 127.0.0.1 (for example, passwords, messages, or credit cards). Learn more about this warning
net::ERR_CERT_AUTHORITY_INVALID"
If so, ... in that page, Crhome shows a button ADVANCED. Click on it, and you'll get
"This server could not prove that it is 127.0.0.1; its security certificate is not trusted by your computer's operating system. This may be caused by a misconfiguration or an attacker intercepting your connection.
Proceed to 127.0.0.1 (unsafe)"
Click on Proceed. Then you should get the SABnzbd web interface again.
Then ... to avoid this in the future, you can go to
https://127.0.0.1:8080/config/general/ . In there, go to "Enable HTTPS" and disable HTTPS.
Also note the warning at HTTPS:
"Enable accessing the interface from a HTTPS address.
WARNING Modern web browsers and other clients will not accept self-signed certificates and will give a warning and/or won't connect at all."
So that is what you got when enabling HTTPS.