You are stuck and the Indoor Camera installation is incomplete because you are being told it is already installed.
My Camera is already linked to my account, but at another location
You'll need to ensure that the camera is not already installed at another location. To do that, go to the home page for your account in the Somfy Protect app. Click on the arrow at the top of the page. This menu lets you access all the locations associated with your account.
For a better use, the camera should be installed on the master device account. If the camera is on a different one, please delete it and reinstall the camera on the right account.
I have multiple email addresses, and I am using the wrong one to access my alarm
I am not logged into the right account, so I am being directed to install my equipment.
Follow the instructions in this article: Why is my account empty when my alarm has already been installed?
Upon the 1st installation, I get this message
Your Somfy Indoor Camera is new and you are installing it, but you get this message. Contact customer service.