In Advanced -> Diagnostic Tool, I enter either a server name or an IP address and choose either ping or traceroute and the only thing that changes is the caption of the button from "Start" to "Stop"...

Nop, it didn't work on my C9, still getting the error 938 config importing failed

I didn't know there are different firmwares for different regions. I have a C9 bought in the US but I live in LATAM, the firmware updated to the latest US version but I see the latest LATAM version...

Now it is pubhlished: https://www.tp-link.com/us/support/download/archer-c9/#Firmware Published Date: 2019-04-15 Language: Multi-language File Size: 27.07 MB Enhancements: Improved the stability and...

a huge thank you for sharing!!!

Thank you, now the C9 shows. I meant the firmware version is not published in the product's page, but it made the update anyway so the version was released.