Please try the below mentioned steps:
1. Go to Lightroom Preferences > click on performance tab
2. Uncheck Use Graphic Processor option
3. Restart Lightrroom
4. Then try to use sync option
If the issue still persist,please let us know whether you are working on Mac or Windows.
As it can be the issue with Lightroom not getting proper read and write permissions to make changes.
I unchecked Graphic Processor option in preferences but the issue still persist. I iscovered that I can switch between LR catalogs but the issue appears in each catalog.
What's more the same issue appears when I try to add new presset "Create New Preset" or push the "Copy" buton.
I'm working on WIN 10 HOME.
I appriciate your answer and awaiting new diractions.
Would you please check whether you have read and write to the following location
- C\Program file\ Adobe
I don't see R attribute set up for mentioned folders:
Folder attrib (in Polish):
When LR is freez I can unfreez it by "Esc" but the problem is still unsolved. I tried to save catalog on different disk, no changes. I added new photos to the catalog - I can. Only what I cannot is to use sync, + preset and copy buttons.