The star label rating is no longer working in my adobe bridge 2019. It stopped working in adobe bridge 2017, so I updated to 2019 and it still is not working. The ratings on my previous RAW images have stayed, but I cannot change the ratings or add any new ones. I have also lost to ability to duplicate my RAW images, which I use often to make color and black and white versions of the same photo. I have seen various other posts with this same issue, but none of the posted solutions have worked for me. I have tried purging the cache, downloading new versions, etc. Any help is appreciated.
With Bridge 2019 you need to have the image selected before you can place a rating. Do you have the image selected? On some releases you also need to drag to the right to add a rating and then drag to the left to decrease the rating. This was changed in later releases. Since you didn't mention which release of 2019 you currently have I'm letting you know of this change.
If you do this by key command, you might want to check the Preferences as you may need to have your Command/Control key pressed if this box is checked.
Let us know if any of this helps.
Are you working to a local drive or across the network?
Try resaving one file from Photoshop, then see if you can rate the newly saved file as a test.