Word crashes when using endnotes

I have several documents using the 2019 (16.32) version of Office 365 for Mac. The ones that have endnotes cause Word to crash. Some of these documents are only a few hundred words, some longer. When I work in endnotes for a short time, and sometimes as soon as I open the endnotes, Word crashes. Not just the document, the whole program. 

I have the same documents on a MacBook and an iMac shared via iCloud, and the problem occurs on the Word documents both computers.

Would really appreciate any thoughts about how to fix this.