Hey @Specializer65, it seems that the app crashes when it tries to restore the document that was open the last time. First, you can launch Zotero without restoring this document, by tapping and holding the app icon, and selecting the "My Library" action. Then try again to open the offending document, and let us know if it crashes again. Before opening, please start a debug log (Settings > Debug Output Logging > Start Logging), and if you close successfully, or if it crashes when you relaunch the app, share this debug log id here.
Please also share this document with us by mail to support@zotero.org and mention this thread.
Upgrade Storage
Please also share this document with us by mail to support@zotero.org and mention this thread.