I have started a question which is quite old now and i din get any clear solution to that question still. So i thought to start a bounty for my question but i don see any option in that question. Please look at the screenshot. Is it a bug?

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Why I can't initiate a bounty

I have started a question which is quite old now and i din get any clear solution to that question still. So i thought to start a bounty for my question but i don see any option in that question. Please look at the screenshot. Is it a bug?