script.Parent.Text = "You have " - script.Parent.kills.Value "Kills!"
This Script inside TextLabel "Value" in ScreenGui "kills" attempts to call a number value called "kills" and its Value, while making "Value"'s Text to "You Have x Kills!" x as the number value.
Also, the error i get is the title of this question.
Remember that you cant join numbers with strings,so first you will need to convert your value into a string value
local Kills = tostring(script.Parent.kills.Value) script.Parent.Text = "You have "..Kills.." Kills!"
Hope it helps