Unable to clean, unable to clean, unable to clean.
Yet I can open the folders and delete the files manually. Of all the things it was supposed to clean, it managed to complete exactly zero of them. Why am I paying for this app again?
‘Unable to clean’ is jus a notificatio that not ALL the files in that catagory can be cleaned, usually because some of the files are open/inuse, so it cleans what it can and leaves the rest till next time.
The older CCleaner versions did exactly the same thing, and used to tell you just like the new one does - but the developer stopped it from telling you, because when it does tell you then hundreds (thousands) of people start asking why it isn’t cleaning things.