I own a tp-link RE 305 (AC 1200) as a WiFi range extender.

My laptop is a dual boot computer with both Ubuntu 20.04 and Windows 10 installed.

I set the device according to the instructions and it seems to work fine from my phone and from Windows, yet I could not manage to connect to the range extender via Ubuntu.

I tried the suggestions presented here: https://askubuntu.com/questions/1243314/ubuntu-20-04-wifi-tplink-extender-issue 

yet, it does not seem to help.

Currently, I can connect directly to the router via Ubuntu and can see the range extender as an option in the WiFi settings, but I cannot connect to it.

Can anyone help me?

Thanks

Edit:

I recently gave it another shot after a while and found a solution!

Hopefully, it will be useful for someone.

After restarting the WiFi extender (unplugging and then plugging it back in), it seemed to connect successfully but only until I the connection was lost (for example by a restart to the NetworkManager). I was able to reproduce this behavior several times.

Setting a static IP (and mask and default gateway and DNS hosts) made it work consistently.