Sync Issues

I am getting Sync error 54 and have been ever since I got a new PC

I have authorized the new PC

I have rebooted the PC and my iPhone

I have unlocked my phone and continue to get this message

I have even disabled my AV program and it still does not allow me to sync, which means that some music that I have imported is missing

This is all after my phone ran some kind of resync overnight (not plugged into a PC or with the autosync (if there is one) enabled)

This all happened AFTER i upgraded my IOS to 13.5.1 and I lost my libraries (which just came back recently)...isn't there ANY testing done with these IOS upgrades?