A couple things:
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you don’t need to upgrade Farms to make Giant Harpoons, although the added food production is helpful. But you do need to upgrade Food Storage.
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how long has it been stuck on 1d 23hrs?
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have you contacted Customer Support? The Forum is primarily for player peer support, so you’re unlikely to get a developer response here.
If you haven’t already, you can contact Support through the game by clicking on the SUPPORT button instead of “report a bug.” There are instructions here: