@loanR It appears that you have a problem with your TP-Link router because WhatsApp appears to be functioning while other services or websites are inaccessible. There are several potential causes for this, so I'll walk you through some troubleshooting to try to fix the problem:
 Start the router again:

Remove the router's power cord from the back. Take a few minutes to wait. Reconnect the router and give it time to fully restart.

Examine your internet connection:
Ensure that your internet connection is reliable and operating as it should. To check, try visiting web pages on several gadgets.

loanR wrote

Hi,

Since last week, only WhatsAPP seems to work using the extender 

I have tried turning it on and off but it does not change anything 

the original wifi itself works fine 

Could you help me with this please ? 
i need it for work 

 

thank 

Hi, it seems like you're having trouble with your Wi-Fi extender, and only WhatsApp is working while other applications aren't. First, try reconnecting to the extender, restarting it, and checking for any firmware updates. Ensure a strong signal and consider resetting the extender to factory settings if needed. If the issue persists, contacting the manufacturer's support for specific guidance or seeking professional IT help may be necessary to ensure your work connectivity. 

  @loanR 

For TL-WA850RE extender issue:

1. Check for firmware updates.
2. Reset and reconfigure.
3. Adjust WiFi channels.
4. Optimize extender placement.
5. Review WiFi settings.

If it persists, contact TP-Link support.

Thanks