Turtle Bot 3 setup, Wlan0 dissapears

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Hello,

I am currently setting up my turtle bot 3 using ros melodic on ubuntu 18.0.4. I am following this tutorial https://emanual.robotis.com/docs/en/p... At the beginning of the setup, I have Wlan0 as one of my devices but by the end, it disappears. I had this issue earlier of "wlan0" being gone and thought it was an issue with my setup. reset the TB3 then restarted setup and it is still gone.

All I have when i use, "Ip addr" is eht0 and lo

Has anyone ran into this issue and knows how to fix it?