I encountered a strange issue after upgrading to 6.1.4. On my one unraid server, almost every morning the web UI would display, but the array page was blank and the dashboard didn't show any disks. I rebooted yesterday and it cleared, but this morning it was doing the same. I noticed in the /var/log/unassigned.device.log the following entries:
at Nov 21 10:31:14 EST 2015: PHP Warning: set_error_handler() expects the argument () to be a valid callback in /usr/local/emhttp/plugins/unassigned.devices/UnassignedDevices.php on line 428
Sat Nov 21 10:31:24 EST 2015: PHP Warning: set_error_handler() expects the argument () to be a valid callback in /usr/local/emhttp/plugins/dynamix/include/DefaultPageLayout.php(289) : eval()'d code on line 550
Sat Nov 21 10:31:25 EST 2015: PHP Warning: set_error_handler() expects the argument () to be a valid callback in /usr/local/emhttp/plugins/unassigned.devices/UnassignedDevices.php on line 428
Sat Nov 21 10:31:29 EST 2015: PHP Warning: set_error_handler() expects the argument () to be a valid callback in /usr/local/emhttp/plugins/dynamix/include/DefaultPageLayout.php(289) : eval()'d code on line 550
Sat Nov 21 10:31:30 EST 2015: PHP Warning: set_error_handler() expects the argument () to be a valid callback in /usr/local/emhttp/plugins/unassigned.devices/UnassignedDevices.php on line 428
I removed the Unassigned Devices plugin, and the UI began acting normally again.
Update:
I tried reinstalling to see if it would happen again, and now I get an error message as in the attached screenshot...