I was making a learn and improve your memory game and suffered from a problem.
These are the blocks of my project.
But after trying to run it in AI Companion, I got a Runtime Error.
Please help me in resolving this problem.
Message is quite clear.
You are providing a int instead of Button.
But I could Not Find where is the problem in the coding. 
You should check this part:
Thanks I got what is wrong. Thanks