@Luff you guys get this resolved?   

currently having same issue and it seems to be 4 months after you guys.

  @David-TP any update on this? it's been > 1/2 year, I'm still facing the same issue - so many test servers don't work even if I choose manually. This is ridiculously long wait.

David-TP wrote

Update:

This Article Applies to:
Deco APP version 2.x.x

Issue Description/Phenomenon:
Recently, we have got some user feedback After clicking "Run Wi-Fi Diagnostics" under Deco APP>Deco Lab>Wi-Fi Assistant, it reported'“you are offline, check your Internet connections, get back online, and retest your speed” when it comes to testing Internet speed. However, when customers try to use the speedtest by ookla app for testing speed, it works perfectly fine.

 

Solution:
This is not an issue of Wi-Fi Assistant but an issue of the specific speedtest server. When the current speedtest server is not available, WiFi Assistant will raise that error.  We are currently working on a new failover mechanism that allows switching to other servers when the first one fails during Wi-Fi Diagnostics.

Meanwhile, please test the speed individually via the “Test Speed” feature under Wi-Fi Assistant (this feature allows you to manually select servers) or using the Speedtest APP by ookla.

 

 

  @David-TP