Lightroom Classic 10.2 crashes on switch to web module

When I switch to the web module for the first time after importing some images, Lr Classic either crashes or displays the message "Error initializing web module." If I quit and restart, it generally works the second time. Running MacOS 11.2.3.

BTW, annoying that you can't select the build # in the About box, which would make it easy to paste it in here...