It looks like you’ve managed to connect to the phone, but the yellow warning triangle on the subject indicates that Live Link Hub is not receiving any animation data.
Once you’ve connected to the phone it sends animation data as UDP packets to the PC. If this isn’t working it indicates a networking related issue.
Please check that you’ve enabled ‘Local Network’ access for Live Link Face in the Settings App on your iPhone. If this is disabled the application will be blocked from sending animation data to the PC.