On tilix I do the command ifconfig and I see my wifi antenna that is well connected to my network.
I made a "ping puri.sm" but impossible to resolve the domain

I have a librem13 V2

Thanks for your help

If you have not already, you may want to look at /etc/resolv.conf and see if any nameservers are there. Many moons ago, though not on Linux, I had a vpn that would create new dns data. When it crashed, I could not get out of my local system because the it was trying to use the vpn-created entries and had no clue. I had to undo the changes before things would work again.