Some Tesla users were locked out of their cars on Friday due to global app outages. The outages were the result of the mobile app's inability to connect to the servers. Responding to a Tesla user, Musk blamed network congestion caused by an unexpected increase in traffic.
https://www.notebookcheck.net/Tesla-users-lose-access-to-their-cars-due-to-app-outages-Musk-blames-network-traffic-congestion.580450.0.html