AR300M ext and bad settings

Hi, so I messed some things on my new AR300M ext:

I changed the WAN>WAN to WAN>LAN , and from there (I think) everything seems to break :

I don’t have wireless access anymore (LED shows up and quickly turn off), I can access the UI on ethernet to my pc, but nothing’s responsive anymore.

I tempted to restore the original settings without success.
I tried to follow Debrick via Uboot - GL.iNet Docs, but I can’t access to upload the firmware.

So I’m stuck, I would just want to clean it.

Your help’s appreciated!

(edit: the AR300M is connected to a LAN on a netgate (pfsense) router, so I’m using the cable mode).

Nevermind, a hard reboot finally worked.