For Android 6 and later, you have to open the Location Service (I don’t know why, but Google says accessing Wi-Fi in App should get the Location Service permission).
It seems that Wio Link can not get IP from your WiFi router.
Which encryption your router using? By now, Wio Link support WPA/WPA2.
BTW, Wio Link Android App has been updated to 2.2.0. pls update it.