iMac 'spinning ball' when LR is started

I am running the current version of LR. On my late 2013 iMac once I open LR and bring up an image for edit I immediately get the spinning ball and can't go any further. 

Is there something I should be doing differently. Worked fine until this current version. My iMac is running Big Sur and will not be able to run Monterey.

Can I move back a level in LR?