Following the installation of the sendmail-bin package, my omv4 went up in smoke!
So, without wasting time, I reinstalled all over again, but this time I opted for omv 5.0.5
The problem is that I can't do almost anything via the omv web interface. working on shared folders or on shares, everything is slowed down and at the end of the operation (which is not successful) always gives me an error message such as "communication failure" or "Gateway Time-out". Above all, in the logs, I see this line that makes me think: "monit : 'nginx' failed protocol test [HTTP] at [127.0.0.1]: 90 [TCP / IP] - Connection refused". On the old installation I had installed nginx, but on the new one I didn't! As is possible, the omv installer had formatted the partition!