How can  I accept an answer in this forum?

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Hi, how can  I accept an answer in the forum? I clicked the following button next to good answer related to my question: but 40 minutes later, I do not see “STATUS: ANSWER ACCEPTED” for my question, whereas I see that status in some answered questions by other persons. What other action should I take, or do I just need more time until somethings synchronizing or so?
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Seems to be a bug. Can you try it again? 
What you described is the way to accept an answer. 

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But it is looking good for me. 

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