Is there an easy way to pop-up error messages

hello, is there an easy way to pop-up error messages without having to make an extra panel for every possible error I can throw?

Just make one panel and change the text when you have an error.

What kind of pop up message? When I get some error massage, the first thing I do is to check browser extension to see if there are otehr unfamilar things there. if it does, I will remove them. My friend told me that most pop up errors are fake, only want to trick clicks.
here, you can learn some details and guides about pop up msssages.

http://www.totalspywarefix.com/category/fake-error-massage

please help me ,
This appears when I open the unity and if I did not Responds Commands