Bug: no items to display

I subscribed to CCleaner - being a premium user of CCleaner for Mac.
Unfortunately, CCleaner for IOS keeps scanning my files - after finishing it categorized the items in the different media categories, but when selecting a (random) category (e.g. ‘blurry images’, apparently containing 5 items), it states ‘no items to display’ (or in Dutch: ‘geen items om weer te geven’).

Any suggestions?
I already tried re-installing, I am on the latest IOS-version.