@MarufAhammed Thank you for reaching out to us and welcome to the TP-Link community. Is there an issue with the router? I honestly don't have information for that router log, but I can consult with...

@dantanian Who is your ISP, please? Is the IPv4 connected fine? Are all the parameters for IPv6 confirmed to be correct, such as Get IPv6 Address: SLAAC? Please try choosing Auto.

@Whiskers68 What is the model number of the DSL modem? You can find it on the modem bottom sticker, which should start with Archer xxxxx. Which light is off after connecting the extender to the modem...

@WebMonster Please check and update the firmware of Archer C64 to the latest official version, which could be 1.12.0 or 1.12.1 now. Then try to enable the WDS bridging again to connect to the...

@RobbieB50 Thank you so much for all the test and information. I was informed that the official version should be working the same as the early release version we provided on the community, so I'm...

@pla Thanks very much for sharing all the detailed info. To address the issue and try to fix it, we would like to have a specialist look into this further via email. Please check your mailbox later,...