MacBookPro Retina 2014 connects to internet, but not home network
MacBookPro Retina 2014 connects to internet, but not home network. I can surf the web, but I can't connect to other computers on my home network, using Wi-Fi or ethernet via a Thunderbolt Bridge connected to the MBP.
There is no Network displayed on Finder windows on the MBP. I can see the MBP on my MacPro. I can mount the MBP drive on my MacPro desktop, but some of the folders that I can open show no contents, even though I know there are GBs worth of content in them. Notice the twirlies in this screen cap that show several GB, but no contents:
Permissions for this User folder are set to Read & Write.
I'm sure my Sharing and Network settings are correct on all devices. It was working before. Now it isn't. I reinstalled Catalina 10.15.7 on the MBP, and that made no difference.
Also, if I try to mount an external drive connected to the MBP, I get this error message:
MacBook Pro Retina