Sorry to hear you are having issues. You might need to reset it position. Try this, while it is roll down. Click and drag at the Fence titlebar. Drag it until the bottom of the Fence barely touching to taskbar. Release it there and see if it roll up. Might need to try it couple of times. If you still fail to do it. Try take a video of your issue and post it here.
Stardock Community Assistant.