Reconnect missing Search Console property
If one of your Search Console properties disappeared or data stopped flowing into SEO Gets, it's like one of two scenarios.
Scenario 1: Your Google account has lost access to the property
If you haven't lost access, disconnect and reconnect your Google account to SEO Gets
If you have lost access, contact an admin of the GSC property to be granted access
Scenario 2: Someone on your team lost access to the property
It's also possible that one of your team members was providing access to the property via their connected Google account
If that team member lost access to the property or they were removed from your team on SEO Gets, then you will lose access to that property until:
That team member is re-added to the team (if they maintain permissions for the property)
You request access from an admin of the GSC property