Hello, There were 3 errors like : "(98)Address already in use: make_sock: could not bind to address [::]:443" With ports 80, 443, 8081. The error with port 80 disappeared when I stopped lightppd (which was listening on port 81). The error with port 443 disappeared when I removed an extra line "Listen 443" which was added by ispconfig upgrade. And after that, apache has started with no error on port 8081 (apps). A bug ?