How... Mobile Preview

did you try with different OS ?

When i write the “code” in my browser, it stills doesn’t open my project.
(Connected in the same network, no firewall)

@JimDev And if you click on “Run on this PC”, in the network preview window, does it work?

@Goku If the problem is on GDev side, if you press ctrl-shift-i and check the console when you start the network preview, I assume an error would show.

@Gruk Yes it works.

Do I have to do something in my phone (iOS)? Does it work with every iOS, Android?

I think it should work with all OSes.
GDevelop starts a mini Web server on the computer, and the other devices access the game like any Web link.

Did you try to insert the debug address on the browser on the PC where GDevelop run ?
If yes, can you please show me what is the address ?