Please try the following solution:
(1) Check if you have already slid the toggle to 'Cable' mode.
(2) Please try a different device and check again if it works in cable mode.
(3) Make sure your device's firmware is installed and up-to-date. Click here to learn how to update.
(4) Try connecting your keyboard directly to your computer, bypassing any USB hubs.
If you have tried all of the steps above and still experience issues, please contact us at support@keychron.com and our support team will reply to you within 48 hours.
In your email to our Support Team, please provide the following details so our support team can help you as fast as they can, thank you:
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Order number
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Order email
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A photo, video, or related information showing the issue