Certificate TLS inacceptable

[sylvek]

Playing with a secured websocket, I have this error:
pi@homepi:~/kiosk-browser$ ./browser

(browser:1831): Gtk-WARNING **: cannot open display:
pi@homepi:~/kiosk-browser$ DISPLAY=:0 ./browser http://192.168.0.5:3000/current

(browser:1836): GLib-GObject-WARNING *: Attempt to add property GtkSettings::gtk-label-select-on-focus after class was initialised
* Message: console message: wss://sylvek.hd.free.fr/mosquitto @0: WebSocket network error: Certificat TLS inacceptable

** Message: console message: wss://sylvek.hd.free.fr/mosquitto @0: WebSocket network error: Certificat TLS inacceptable