How to set a prefab a link to an object so that it is saved?

Question

Unity

When I create an object, Unity swears and does not start:
UnassignedReferenceException: The variable BalanceGive of ClickOnMonstr has not been assigned.
You probably need to assign the BalanceGive variable of the ClickOnMonstr script in the inspector.
I inserted all references to objects in the inspector in the prefab, but when I create the prefab through the script on the stage, this error pops up. How to make the link work after the object appears on the stage?