i already did Go to the /etc/apache2/sites-enabled/ directory and delete the symlink with the name of that issue site there. Then restart apache. but not working
Seems as if you deleted the ispconfig ssl certificate, so the issue could not have been caused by creating a website, you must have done something else as well like trying to exchange the central ssl cert. You just recognized the issue now as creating the site restarts the webserver. To fix your problem, you will have to create a new ssl cert for ispconfig, you can do that e.g. by doing an ispconfig update and choose to create a new ssl cert during updater when the updater asks.
but i'm already 3.1.15p2.. >> Update Please choose the update method. For production systems select 'stable'. WARNING: The update from GIT is only for development systems and may break your current setup. Do not use the GIT version on servers that host any live websites! Note: Update all slave server, before you update master server. Select update method (stable,git-stable,git-master) [stable]: There are no updates available for ISPConfig 3.1.15p2 root@server:~#
Did you use the search function? https://www.howtoforge.com/community/threads/forcing-ispconfig-upgrade.81756/#post-387447
cd /tmp wget http://www.ispconfig.org/downloads/ISPConfig-3.1.15p2.tar.gz tar xvfz ISPConfig-3.1.15p2.tar.gz cd ispconfig3_install/install php -q update.php
