Structure jigsaw error - no pool named trial_chambers/chamber/end

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We're tracking this issue in MCPE-179139, so this ticket is being resolved and linked as a duplicate.

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so how do u fix it?

Literally having the same issue via XBOX series S. I haven't got single reply from mojang mod staff. It deleted the most recent progress on my world. Now when I log on, its from over a year ago and it wont allow me to save any current progress. This is the worst...