in your screenshot it appears you are not in wisp mode - is that right?

when you have it configured in wisp mode do you have the ethernet cable plugged in as well? if not have you tried rebooting the router after switching modes?

are you using vpn configured on the router?

what is the noise level on the gl-inet device to your upstream wifi device? you can find it in the wireless tab in luci here: http://192.168.8.1/cgi-bin/luci/admin/network/wireless – mouse over the connection quality indicator.