Help! I always get internal error

Whenever I want to submit CHEFTAK I always get internal error. I even connected to an other wi-fi so i don’t think it is my net connection. I have this problem for more then half day. Could anyone help me?

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this is not only with you.
read this

https://discuss.codechef.com/questions/137123/october-challenge-problem-cheftak-is-a-mess