Amazon Web Services, Google, OpenAI and Spotify were down on Thursday after a widespread technology outage.A large number of platforms appear to have been impacted, with tens of thousands of users reporting issues on Downdetector.

We’ve seen issue reports on Downdetector and some error messages pop up for other large cloud-based services, too, like Snapchat and Discord, but so far, it’s not entirely clear what is causing the problem or exactly which platforms are affected.

Multiple popular online services were hit by outages on Thursday afternoon, including Spotify, Discord, Google and Amazon Web Services, according to Downdetector, a website that tracks service disruptions across the web.