Hello JCF, today I saw that my bug report forwarded to https://github.com/sabnzbd/sabnzbd/issues/811 and I read what there was writing. First of all, I want to thank you and thezoggy. He has the right thinking. I have now purge my sabnzbdplus again completly, and delete the certificate in my Firefox too. After that, I install the SABnzbdplus 1.1.1 in Debian 9 Stretch again and now it re-created a new ssl certificate. Now it works without an error. The bug tracking can be closed and solved. :-)
P.S.: The user Safihre said, I have to upgrade to version 1.2.0, but I will just use these main repository of Debian. Nothing else. Friendly regards carlchen

