UBB.threads PHP Forum Software Community Forums UBB.threads Installation and Upgrade Support Error when trying to change settings in the Display Options

I am getting an error anytime I try to update the settings in the General area of Display Options.

This error states "HTTP 406 Not Acceptable"

What gives? Any ideas? I know that the permissions required by the ubb software are met as I have changed all of them and everything passes. Also, the board seems to be functioning for now.