Why does the game not see some components after restarting a level in Unity?

Question

Unity

If you lose, the event is triggered, and the character turns on the ragdoll (I make all Rigidbody non-kinematic and turn on the colliders). Then the level restarts, then when you lose, an error pops up that the Rigidbody has been destroyed. I specifically checked the colliders and the rigid body right after the restart - everything is fine. Help solve the problem please