Stuck In Park?

This could be the shifter as mentioned or something more serious like a valve body issue. I attached the process below for the shift cable. I would suggest inspecting it and make sure that when you are moving the shifter that the manual level on the side of the transmission is moving as well. If it is, then we need to check the transmission fluid for condition and level. If this is okay, I suspect we are going to have to drop the pan to find out if there is metal in the pan and inspect the valve body.

Let's run through this material and go from there. Thanks