Lightroom Classic 7.4 Crash on Opening -- Mac

Hello --

I am running Mac OS High Sierra (10.13.5) and recently upgraded to Lightroom Classic 7.4.  After the update, Lightroom crashes when I boot it up and try to open my catalog.  A crash log submission has been sent to Adobe.  I have created a new test catalog and Lightroom will boot into that new catalog.

I have downgraded to Lightroom 7.3.1 and it opens my normal catalog without a problem.  Any insights as to what may be going on?  Is it a catalog issue or a Lightroom program issue?

Thanks for any help!

MDW