I've been trying to update several antiviruses, they can't find server. Duck Duck Go app can't access internet too. Google Play and Chrome works fine. I'm using wi-fi shared by my laptop, in properties: WAP & WPA2 Personal, mode -infrasturcture.
Are there any proxy settings to access your WiFi? (proxy settings might be provided by your network provider). Most of the apps can't access the proxy settings provided by the android. For resolving that you can use ProxyDroid app (but it needs root-access).