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-8479

Notice

This document is a machine-translated draft and is currently undergoing review. Some content may be inaccurate or differ from the original Korean version. For the most precise information, refer to the Korean documentation.

  • Error code: -8479
  • Summary: Concurrent playback prevention

Symptoms​

Playback is blocked because the number of playable devices has been exceeded.

Cause​

This occurs when the number of devices that can be registered per account has been exceeded according to the security policy, or when the content is already being viewed on another device.

Solutions​

  • Check your primary device: Due to content security policy, play content only on the device you primarily use.
  • End existing sessions: If you are logged in to the educational site on other devices (smartphone, tablet, another PC, etc.), log out of all of them, then try logging in again on the current device.
  • Contact site customer support: Request a "device registration reset" or "concurrent access restriction removal" through the customer support of the site you are using.