Unexpected error


I am getting an unexpected error while I work. I don't even submit the code before I get something like this:
The program took too long to finish. Check your code for infinite loops and try again.

I don't have any infinite loops because I do not submit anything. What is the problem


It must be a normal problem since many people got when trying this exercise. I suggest refreshing your browser's webpage and copy paste your code to submit it before it says this error.