no more "Waiting to connect" after the firmware update

Good morning,
I have 5 YI Home 1080p cameras at home and last week I updated the firmware. Since then 3 of the 5 cameras have stopped working. I have tried resetting them, an orange light comes on and keeps flashing without ever saying the phrase Waiting to connect. I have repeated the procedure over and over, moved the cameras close to the router, tried installing them again but nothing. Can anyone help me? Thanks

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