@Asaft I have the same problem with my Deco E4,I've been using it for almost a year then suddenly this afternoon netflix stopped working/ can't be accessed in router mode, In AP mode on smart TV does not work.

@Asaft 

Hi, thanks for your patience.

We would like to forward your case to the senior engineers and could you please help me check the following information:

1. Except the smart TV, are you able to access the Netflix via mobile phone and laptop?
2. Have you set up any parental control on the Deco M4?
3. Is there any change recently, like a firmware update?
4. If you follow the notice on the TV and reboot the smart TV, would Netflix start working again?

Thank you very much and wait for your reply.

Hi,

Thanks for your reply. Here are the details:

TP-Link wrote

1. Except the smart TV, are you able to access the Netflix via mobile phone and laptop?

Netflix works fine on other devices (iPad, iPhone) while connected to Deco.

TP-Link wrote

2. Have you set up any parental control on the Deco M4?

No

TP-Link wrote

3. Is there any change recently, like a firmware update?

I only have Deco installed for about 1 week now. The problem occurred straight out of the box, and continued after updating the FW to the latest version (1.4.3 build 20200918 Rel. 74289).

TP-Link wrote

4. If you follow the notice on the TV and reboot the smart TV, would Netflix start working again?

After rebooting the smart TV, Netflix would start streaming again, and will stop exactly after 5:50 minutes of streaming, display 'loading 25%' for about a minute, and then display the error. This will happen after every reboot.

The TV is still connected to the internet (Youtube works).

Thanks.

@TP-Link 

@Asaft 

Thanks for your reply.

Could you please try to change the DNS server on the Deco to have a look?

--it is under More>advanced>IPV4>Dynamic IP>Primary DNS/Secondary DNS;

And if possible, please try to turn off the fast roaming, beam forming on the Deco APP and Mesh Technology under the device settings of the smart TV to see if these made any difference;

Thank you very much and wait for your reply.

@TP-Link 

Can you recommend a primary / secondary DNS to input?

Please let me know and I will try the suggested actions.