I was opening up my superflat world and this chunk error appeared for no reason. Also, the superflat world was created and opened in 1.15.2 only. And there were no disk errors too.
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Please force a crash log by holding F3 + C 10 seconds and post it here so we can gather more information 😉

Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of either MC-315 or MC-161823, which is a report that has not been resolved yet.
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