WhatsApp not having access to contacts.

if you have installed CleanMyMac, it "cleans" all sorts of things and interferes in ways that are not known by ordinary users here.

The idea that a third party, with no special knowledge of the inner workings of MacOS, can somehow find a simple way to protect or optimize your computer — that is not already being done by MacOS itself — suggests that the MacOS developers are somehow "holding out on you". That is absurd.

 You should remove any and all (other than Apple built-in) virus scanners, speeder uppers, optimizers, cleaners, App deleters or VPN packages you installed yourself, or anything of that ilk.

CleanMyMac is malware. it does not even completely remove ITSELF.

Your computer can not operate properly with malware installed.