I had this problem initially when first getting onto the Public Beta for Big Sur. The issue turned out to be something to do with VirtualBox. As I wasn't using VirtualBox for anything at the time I uninstalled VirtualBox and Docker has been working again up until a few days ago when I re-installed the latest release of VirtualBox which (apparently) now has support for Big Sur. Now Docker simply will not start again.
Clearly there must still be some issues with running the two together still on Big Sur.
I've just uninstalled VirtualBox again and Docker starts up fine.
fsociety3765
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