Question Adding Gravity to a First-Person Player

Hello, I am here with a question about first-person controllers. I am a beginner game developer, and I am trying to make a player character for an fps game. Currently, I have an issue simulating gravity with the player.
I tried to include gravity by adding a constant force to the player. I planned to prevent the player from clipping through the ground through this method: First, I made an empty game object and attached it to the bottom of the player. I then added a collider and some code so that if the empty object collided with the ground or any object, the gravitational force would equal 0 and the player would stop falling. However, whenever I tested the game, the game would pause and present an error message as soon as the player hit the ground. This is the error message:



The code:




I appreciate any help I can get. Thank you!

 

I actually just fixed my issue, so this thread is unnecessary. However, feel free to post the solution so that others can learn from it.