Hi Garrett

I wired it up to a USB socket & programmer, set the PLL clock source, loaded the HEX file but get "USB Device Not Recognised"

Resistors are 47R and 2k2, not exactly the same as yours but what I had.

I enabled ClkOut and measured it as 16.2MHz

Checked wiring against schematic & your PCB layout...

Still no-go :-(