I restarted my OMV5 system running on a Raspberry Pi4. I have done that before and never experienced any problems.
After restart, I cannot connect to the web interface of OMV. I can connect to the web interface of Portainer and also the web interfaces of the containers.
I received the following email:
The system monitoring needs your attention. Host: \omv Date: Sun, 29 Mar 2020 12:54:32 Service: nginx Event: Connection failed Description: failed protocol test [HTTP] at [127.0.0.1]:80 [TCP/IP] -- HTTP error: Server returned status 502 This triggered the monitoring system to: restart — You have received this notification because you have enabled the system monitoring on this host. To change your notification preferences, please go to the 'System | Notification' or 'System | Monitoring' page in the web interface.
What can I do?