Ventura 14.5 file sharing still not working

First, Avast and Clean My Mac should be completely uninstalled with an official uninstaller. There have literally been many hundreds of posts from users whose problems were resolved when these programs were uninstalled. Just turning them off or putting the application in the trash is not enough. These are intrusive programs that place files in many different places and if you want them still, fine, but uninstall them temporarily to see if they have caused this.

A common problem is that an update or upgrade of the MacOS results in a major glitch later attributed to one of these programs. Or they work with an older MacOS but not with the newest one.

What you say about turning off the firewall and this having an impact is a red flag. These other programs meant to "protect" you often conflict with the Mac's built in protections.

I don't know much about CLAM AV but you don't need anti virus on a Mac so these anti virus programs can do nothing positive and can only do harm.

There is no macOS 14.5.

macOS Sonoma is currently in beta development stage and will be available later this fall.

Perhaps you mean macOS 13.5 which is the latest version of Ventura.

Please scrutinize your setup for Privacy and Security (in Settings) and also check that you have no third party security, safety monitoring, anti-virus, or VPN software active, or even installed but inactive. Also, if you have any "cleaning" type software on your Mac those tools can lead to removal or modification of certain files that may interfere with normal MacOS functions (such as Sharing).