PLANO, Texas - A cyberattack on an online learning platform disrupted schools and universities nationwide, including many in North Texas. Canvas Outage What we know: The Canvas outage and data breach on Thursday impacted more than 30 million active users across the nation, just as many were preparing to take final exams. Canvas is one of the most widely used learning education platforms. Students and teachers use it to access assignments, grades, lecture videos, and course materials.