It looks like Zotero crashes when trying to open some specific document. You can long press the Zotero icon on your home screen and choose "My Library". It should take you to your library and stop crashing.
Then if you can remember which document caused the crashing for you, could you send us the document to support@zotero.org?
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Then if you can remember which document caused the crashing for you, could you send us the document to support@zotero.org?