Hello, you can troubleshoot by following the methods below:
Please first check whether your account and password have been entered correctly.
If you log in with an Apple ID, it is only supported on iOS devices and cannot be used on Android devices. We recommend that you bind your mobile phone number or email address, after which you can log in using your mobile phone number/email address.
Check the network and device: Login failure may be related to the server, network environment, or email settings. We recommend switching the network or trying again at a different time. You may also attempt to log in on another mobile phone or device.
Check the login region: The region selected for your account must match the region of your current IP address. For example, logging into a US-region account while located in Chinese Mainland will result in login failure (in accordance with relevant regulations, cross-country/region login to the App or device addition is not supported).