Setup not possible

I have received a ring doorbell but when I want to add it to the ring app in my android smartphone it doesn't work .1.First I scan 2.The device ask me if the light is rolling3.I press the orange button -\> thrn the light is rolling4.Then I click on "continue"5.The device after 5 mn (so long) ask me to connect to a wifi network but it's not possible because this network does not appear on the list on available wifi serversThe name is "%1$s" So at the end the device is stuckCan someone help me please ?