Perhaps you could copy the catalog file to the local drive (SSD or local hard disk) and try importing it from there.
Alternative explanation: you have some network malfunction.
If I did that than it would require me to find photos since the link would be broken between the catalog and the NAS. I'm not sure if it is a setting that has been changed or if the software has been changed but it should allow me to read the catalog from the NAS to import.
I think the catalog has to be on a drive physically connected to the computer you are using. Not across your network on the NAS.
Also there are many reports if you are using the Apple network protocol, AFP, LR doesn;t like that and you should change it to SMB.
DJ, the idea worked for placing the catalog on a local hard drive. But once the catalog was loaded and i clicked on the photo here is the error that I got:
I'm sure it's in my settings somewhere why would it work before and not now. Hopefully someone from Adobe can enlighten me on what I'm doing wrong.
Click on the Locate button and then find this exact photo and select it.
Any chance there was a power outage while you were away? Have you tried to reboot your NAS? Quit Lr > reboot your NAS and your computer > reconnect to NAS > Open Lr
I turned off the NAS, rebooted the computer, turned off AFP, turned off SMB independently and nothing worked. I just cannot understand how it worked for such a long time and now it does not. I'm sure it's a setting either in the NAS or on the software. Having to download to the desktop and then finding the folder is just a pain especially since I'm so backlogged with photos right now.
So to clarify... you can import images into Lr from other locations - just not from the NAS?
And you can copy files to the NAS without any problems?
The problem occurs when you are trying to Import from Another Catalog?
What happens if you create a brand new catalog - just to test? Same error?
What happens if you try to import images located in a folder on the NAS - just a test?
Is it possible that the catalog that you are trying to import has the problem?
Sounds like you are describing the acknowledged bug with Classic CC that was reported here: