Why is it throwing a NullReferenceException?

Question

Unity

I wrote a script on the unit that if the variable is less than or equal to zero, then the text becomes invisible, and when vice versa, then it displays the text:


When time_money_update is greater than zero, then it comes out:


And when it is less than zero:


I myself tried to figure out how to remove this error, but nothing failed
In addition:

Answer 1

So do another Debug.Log(<here_image_with_variable>) to make sure that the component with the text exists.