If your Google Analytics View is marked as 'Disabled' in Leadfeeder it means Leadfeeder has stopped processing leads from it. This can be because of exceptionally high traffic volumes or issues with the Google Analytics API.
It could also be that your Google Analytics access or setup has changed. Be sure that you have admin/read & analyze permissions with your account.
If the permissions are correct you can try detaching and then reattaching the Google Analytics view.
However, Google Analytics isn't required for Leadfeeder. The Leadfeeder tracker does all the work while Google Analytics is a supplement for some integrations and data. Be sure you have Tracker installed and you will be seeing leads!