Adobe has released a bug fix version of Lightroom Classic (v11.0.1). This version addresses a small number of bugs affecting some customers.  To update your copy of Lightroom Classic to 11.0.1 follow the guidance provided under the heading ‘Check for latest updates’ in this Adobe Help document.

Bugs fixed:

• Catalog can fail to upgrade from 10.4 to 11.0
• The application becomes unresponsive / hangs on quit (macOS only)
• The application crashes (Windows only)

There are also reports of the application running out of memory on Mac systems. However, this particular issue is due to memory leaks in macOS Monterey rather than Lightroom Classic.

Disclosure: As an Adobe Community Expert I receive a free subscription to Adobe Creative Cloud