Internet connection being faulty at home and work, along with certain programs refusing to work, i.e. creative cloud, word, preview

My internet connection seems to cut out and nothing loads to even a no internet connection page. This happens at home and work so its not the providers problem and every other device connected to the wifi is working. I realise some programs run with internet but programs such as preview and others close immediately after opening with on explanation

I've also tried resetting permissions and clearing DNS, seemed to be successful for a shortwhile but the problem persists