Can't solve puzzle 2832

I’m a beginner and I’m trying to solve this puzzle https://online-go.com/puzzle/2832 but I can’t without a warning of wrong movement at the third turn.
I mean, the first and the second turns are right, but at the third turn, the system accepts my movement and the system replies with another movement, but it says that is wrong.
I think it is a bug. Any comment is appreciate it.

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