Button no response at facebook instant game server

Hi there,
I am new in phaser3.
I use the button code below
var sprite = this.add.sprite(400, 300, ‘pic’).setInteractive();
sprite.on(‘pointerdown’, function ()…

It works just fine in my localhost by click of mouse.
But after I upload the .zip to FIG server, there is no response of the finger-touch in the mobile device.
Could anyone help me with this?



By the way,

I just test the button on PC with Chrom and in facebook web.
It works, too.
Don’t know why the mobile device can not work.

I got it