I have OMV on a rpi3B, with official PSU, and plugged through Ethernet to my home's router.
I am getting a "Software failure, press left mouse button to continue, session expired" message every now and then on the webGui.
This happens with and without any kind of HD or usb plugged in.
I am booting from a Sandisk 16GB SD card.
Please let me know which logs could help to pinpoint the problem.