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Having trouble?

Start with the checks below. You can also prepare diagnostic information about the issue and your browser.

A support channel is being prepared

A public support email or submission channel is not yet available. We will list it here when it is ready. The tool below copies diagnostic information; it does not send anything to the operator.

Quick checks

I cannot hear the sound. Preview the sound, check the device volume, and check whether the site is muted in your browser.
Alerts are late when the screen is off. Check screen lock, sleep mode, and background restrictions. Use the timer with the screen on.
My settings disappeared. Check whether you are using the same browser, private browsing, or have cleared site data.
Fullscreen is not working. Support varies by browser and device. Try an up-to-date browser.

The User guide has details of each feature.

Prepare an issue report

Diagnostic information is generated only on this screen. Do not enter personal information such as names, phone numbers, or student details.

What were you doing, and what went wrong? Diagnostic information to copy

JavaScript is unavailable, so the environment information could not be generated. Describe your device, browser, and the issue manually.