TIP: Tahoe 26.7 potential file sharing problem

If you run into a problem with file sharing after updating to Tahoe 26.7:

After I updated from Tahoe 26.6.2 to 26.7 (M1 iMac), The existing file shares I had enabled were no longer accessible from my MacBook Air or from my Windows 11 computer. I was however, able to access shared files on those computers from the version 26.7 computer but not the other way around. I rebooted all the computers and it still didn't work.

What fixed it?

On the Tahoe 26.7 computer, I went to System Settings > General > Sharing. Turned off File sharing. Then turned it back on. File sharing then began working again.