Home Sharing Incompatibility
I am experiencing a strange issue with Home Sharing. I have two computers, an older system running El Capitan (10.11.6) and a newer system running Mojave (10.14.6). I don't want to update either of these systems since that will break functionality I need.
Until recently, I was able to run Home Sharing on both computers with no issues. Now, whenever I have home sharing turned on for both systems, I get an error on the Mojave system. It doesn't happen right away, but within a minute or so:
The selected files could not be copied from “<El Capitan Computer>” because this machine is not a member of the Home Share for the Apple ID “<Apple ID>”.
Home Sharing will keep working until the error is acknowledged (click "OK"), after which it's turned off. I've also seen the following error:
The selected files could not be copied from “” because an error occurred "(5598)."
I searched for similar problems and the only similar problem was here: https://discussions.apple.com/thread/251192232. Is anyone else experiencing this problem? Any solutions?
As a workaround, I can turn off Home Sharing for the El Capitan computer, but that's suboptimal. I did notice that this started around the same time as this issue: https://discussions.apple.com/thread/251378763 which has been fixed for the App Store.
I do know that El Capitan is no longer supported, but I'm hoping there's a fix out there. Thanks.