By default -the adblock is enabled and is stopping quite a few ads from showing.

To Disable AdBlock on the Hidden WiFi VPN Router m250 - navigate to http://admin.hiddenrouter.com/cgi-bin/luci//admin/services/adblock and untick on the top, where it says "Enable Adblock". Press Save And Apply and give it around 5 minutes. Might also require a quick restart.

To enable - follow same directions as above, but check the "Enable adblock" and then press Save And Apply. Allow 5 minutes for changes to take effect.