If you're having trouble using your YubiKey, here are some steps you can take to resolve your issue:

1. Make sure your YubiKey is properly inserted into a USB port on your computer.

2. Check that the application you're using with the YubiKey is properly configured to recognize the YubiKey. For example, if you use a YubiKey for two-factor authentication, please make sure the application is configured to use the YubiKey as a valid authentication method.

3. Try using the YubiKey on a different computer or a different application to see if the issue is specific to your current setup.

4. Ensure that your YubiKey is up-to-date with the latest firmware and software.

5. Try a different YubiKey (if available) to see if the issue is with the one you are currently using.

6. If you still have issues, you can try to contact Yubico support for assistance. They can provide more advanced troubleshooting and help you determine if your YubiKey needs to be replaced.

If you fail to log in due to the loss of Yubikey, please reach out to Bybit Customer Support by submitting a case here. You will receive an automation email and our customer support will contact you within 1-3 working days.