Zen storage server needs to be updated - error when starting Unreal 5.6

I am currently using Unreal 5.4; I tried to update it to 5.6 but when I open it gives me this error message and shuts down →

Unreal Zen Storage Server needs to be updated to a new version. Please shut down Unreal Editor and any tools that are using the ZenServer at ‘C:/Users/username/AppData/Local/UnrealEngine/Common/Zen/Install/zenserver.exe’

I tried re-installing 5.6 and 5.5 but get the same message. Can someone please help.