Keep your Animator open while running your game. Then jump and take a look at the Animator state. Which state gets played while your player is jumping?
Make sure that nothing else in your code changes the animator by setting a bool or something else.
I did some Tweaking in the code, and now Jumping animation, is played when I jump. But it stays in the Jumping animation state no matter what I do, (iddle, run, jump).
Is “Loop” enabled for the animation? Maybe no exit time is defined. You somehow need to tell the Animator when to switch the state again. Does your jumping animation have an arrow back to the idle state?
Expand the Settings directly below the “Has Exit Time” property. Maybe there is a wrong value that prevents your animation from working correctly.
Also bear in mind that all changes that you do while your game is running get lost. For this reason, make persistent changes when your game is stopped.
@Rolando_Peralta, how long is your playerJump animation? And have you already tried to figure out what could be causing the yellow warning message in your console?