So, I am a intermediate builder and a pro scripter. I am trying to figure out how to add number values by 1. Something like this:
script.Parent.NumberValue.Value += 1
But then up comes an error from output, I don't know what I've done wrong. Can somebody please help?

2 comments
Could you show more of the code? Also , what is the error?
@RebornedSnoop Already answered.