HTML error on GL-AR150

After updating to 3.017 when I enter password the web keeps loading for ever. In browser console logs I can see:

[object Error]: {description: “Unable to get property ‘OpenVPN-Client’ of undefined or null reference”, message: “Unable to get property ‘OpenVPN-Client’ of undefined or null reference”, number: -2146823281, stack: “TypeError: Unable to get property ‘OpenVPN-Client’ of undefined or null reference at vpnstatus (http://192.168.5.12/src/temple/index/index.js?v=332e322e3439:182:17) at Kr.prototype.get (http://192.168.5.12/src/lib/vue.js?v=332e322e3439:6:53773) at Kr.prototype.evaluate (http://192.168.5.12/src/lib/vue.js?v=332e322e3439:6:54931) at Anonymous function (http://192.168.5.12/src/lib/vue.js?v=332e322e3439:6:11762) at vpnIconSrc (http://192.168.5.12/src/temple/index/index.js?v=332e322e3439:192:17) at Kr.prototype.get (http://192.168.5.12/src/lib/vue.js?v=332e322e3439:6:53773) at Kr.prototype.evaluate (http://192.168.5.12/src/lib/vue.js?v=332e322e3439:6:54931) at Anonymous function (http://192.168.5.12/src/lib/vue.js?v=332e322e3439:6:11762) at Function code (Function code:1:15) at t.prototype._render (http://192.168.5.12/src/lib/vue.js?v=332e322e3439:6:61159)”}

I have a vpn client configured from luci interface. In version 2.27 this was supported

Any way of configure the vpn client so the Admin Panel also works?

It just happened to work in your case, but was not supported.
What you can do is copy the resulting ovpn file from luci and upload that via the gl ui.

You can also try to install luci-app-openvpn so that you have Luci interface of openvpn.

BTW: what broser are you using?