[ solved ] Issue - User can see a history changes

[joebordes]

Open the Inspection tab in the browser. Go to the Network tab, clear all the calls and click on the History Link. You will see the call in the network tab. If you click on the call you will be able to see the response in the panel on the right. Maybe that can give you some clue.

Also, activate debug log of the application, that should also give you some information, maybe a failing SQL,....