I have Photoshop Elements 2020 Organizer. All face recognition data has been lost from the People tab. Places and Events data is still under the corresponding tabs. However, if I click folders on the left, there will be Named People shown from that particular folder. So there is People data but it is not shown unless a Folder is selected. Before all Named People were shown under the Named People tab. If I try to repair catalogue, I will get an error message Catalogue could not be repaired. Searching people does work so the data is somewhere. I don't have a backup of the catalogue.
Elements Organizer 184.108.40.206 Core Version: 18.0 (20201207.m.154403) Language Version: 18.0 (20201207.m.154403)
System: Operating System Name: Windows 10 Operating System Version: 10.0 System Architecture: Intel CPU Family:6 Model:14 Stepping:10 with MMX, SSE Integer, SSE FP, SSE2 Built-in Memory: 15,9GB Free Memory: 9,6GB
What happens if you select a person in the Tags panel? (I would also be interested in knowing if the stacks reappear in the People tab after you check and uncheck a People tag in the Tags panel. I am having an unusual problem (in Elements 2021) with stacks disappearing after several operations in the UnNamed People room. If I go to the Media grid, check and uncheck a People tag, and return to the UnNamed People tab, the stacks reappear.)
Also, are you able to see any stacks in the UnNamed People room?
What is the exact error message you receive when you try to repair the catalogue?
Since all of the People tags seem to be available, I would suggest resetting the preferences file. Immediately after launching the program, press Alt+Shift+Ctrl. A message should pop up asking if you want to delete the Settings file. Answer OK.