Someone to help a beginner with dual touch controls prefab ?

Hi everybody. Before to ask my question I want to apologize if my english language le not perfect (it’s not my primary language).

I’m learning unity to make a mobile game and i would actually try my work on my android device.
I was initialy on a mac build settings for my scene. For testing purpose.
Basically I have a character and a third person camera. When i clic play i can move my character with keaboard and move the camera with the mousse. All is ok.
So, I switch the plateform build for Android and add the dual touch controls prefab to my scene (and a Event system too even if it’s not needed) all was working great. But today when I try To compile my scene for android the canvas on the dualtouchcontrols are not rendered (if I switch to ios platform it’s working but not on android). I don’t know if it’s a parameter or something like that but i don’t understand.
When I’ve the android system selected I dont see the canvas (even on the editor window)
Someone could help me?

Tex

It’s ok, I’ve found the solution
I was modify by mistake the “Scripting define symbols” on the player settings parameters.
i’ve had “CROSS_PLATFORM_INPUT;MOBILE_INPUT” on the textfield, and all is ok now.
Sorry for the beginner question ^^