@Flo_St. I emailed them at ussupportteam@tp-link.com and went from there.

@dirod27 You're probably not going to like this answer but the solution for me was to schedule a Skype call with the technical support team and have them walk me through updating a couple settings...

@mdflows I just tried connecting to that site on my network. It won't connect through WiFi, but I can connect to it when direct to modem. Sounds like you've got the same probelm I do.

@mdflows My issue is not resolved. Still unable to connect to many websites.

@Tony That sounds great Tony. Send it over. I'm comfortable using the Web UI to update the firmware.

@Tony I've tested 3 laptops, 2 phones and a tablet. None of the devices can access the blocked sites while connected to WiFi. All of the devices can access all of the sites while connected directly...