Your connection is not private
Attackers might be trying to steal your information from sparkmailapp.com (for example, passwords, messages, or credit cards). NET::ERR_CERT_INVALID
sparkmailapp.com normally uses encryption to protect your information. When Google Chrome tried to connect to sparkmailapp.com this time, the website sent back unusual and incorrect credentials. This may happen when an attacker is trying to pretend to be sparkmailapp.com, or a Wi-Fi sign-in screen has interrupted the connection. Your information is still secure because Google Chrome stopped the connection before any data was exchanged.
You cannot visit sparkmailapp.com right now because the website sent scrambled credentials that Google Chrome cannot process. Network errors and attacks are usually temporary, so this page will probably work later.