Hey,
I just clicked on the "Mover" via WebGUI as always (to move stuff from the SSD to the array). Normally the Mover then gets grayed out and does its thing, but this time nothing happened, so I F5ed/refreshed and was greeted by "400 bad Request Header Or Cookie Too Large nginx". Reboot didn't do anything, I still have SSH access though.
I have no idea what I could do or what happened...