In order to increase the stability and scalability of our core systems, our Midwest data center will undergo SCHEDULED MAINTENANCE Saturday, April 22nd 5PM - 6PM MDT. During this time the Marketing Campaigns site will be intermittently available. Scheduled campaigns will be delayed until the maintenance concludes. Customers may also experience brief errors during upgrading, downgrading, or signing-up. If you experience this please try again after a few minutes.
Thank you for your patience through this maintenance. Please contact our support team with any questions: https://support.sendgrid.com/