Answer not submitting

In some problems, it shows " Whoops! We seem to have hit a snag. Please try again later…"

How to solve this problem?

কোন কোন প্রব্লেমে এইটা দেখাচ্ছে?

আমার ক্ষেত্রে হচ্ছে না

Try again or in a minute. This happens when your submission gets marked as a bot attack or something like that.

But I’ve been suffering from this problem for many days only on this problem. I’ve given many attempts but it shows this message all the time.
I can remember it had submitted successfully 2 times 2Y ago. But when I try to submit now, it shows this error only on this problem…

Close the tab and then submit answer again
I always do this when something like 404 error and similar like this occurs

404 error solved by following these steps. But I’m suffering Woops problem in 2 of my devices of the same IP just for this problem…