Cannot turn on file sharing
I'm using macOS Catalina 10.15.7 on a MacBook Pro.
I want to share files with my other computers on the local WiFi network.
I have read the support articles and they all start with the step "Select the File Sharing checkbox." but this is the step I cannot complete.
When I try to check the check box it does not become checked.
Screenshot below:
For info, I can see this computer when I browse the network on my other computer, but only the screen sharing option is active at the moment.
MacBook Pro 15″