MKR NB 1500 unable to connect to webserver

Official Hardware MKR Family MKR NB 1500
12

But you are attached to the gprs data network? (I mean not the mobile network)
I mean

if ((nbAccess.begin(PINNUMBER) == NB_READY) &&
        (gprs.attachGPRS() == GPRS_READY)) {
      connected = true;
 Serial.println("Connected!");
    } else {
      Serial.println("Not connected");
      delay(1000);
    }