Here are my suggestions:
Remake the file.
Restart easel.
Unplug and plug back in the machine.
Make sure the bit isn’t loose in the router.
If it is loose, make sure the spindle isn’t cracked (i.e. Cracked spindle)
Also, when I opened your file the cut settings were extremely high… it says your feed rate is 245.7in/min and your depth per pass is 0.27559in. If these are your actual settings then I’d bet it’s the problem. Looks like the total depth of the square you’re cutting is only 0.119in so maybe the machine is confused by the cut settings being larger than the actual cut?
When I level mine I use a 0.75in bit at 125in/min and depth per pass of 0.05in.