Hello oldim82, welcome to the Microsoft community, I'll be happy to help you today;
In this case I believe the easiest solution is to disable password-protected sharing;
To do this, press Windows key + I and access Network and Internet;
Click Network and Sharing Center;
In the left menu, click Change advanced sharing settings;
In the profiles: Private and Guest or public, activate the options: "Activate network discovery and Activate file and printer sharing;
In All networks, enable the options: Enable sharing so anyone with network access can read and write files and Disable password-protected sharing
Note: Do this on all computers that want to share files over the network;
I hope I have helped, see you soon!