What if Google captcha always shows errors

When you log in, you are always prompted with an error when you enter the Google verification code displayed on the mobile phone. The common reasons are as follows:
1. Google captcha timeout. The verification code changes every 30 seconds. Please input the latest verification code.
2. The time of Google ID (i.e. mobile phone system time) is not synchronized with the correct time.
If this happens, you can refer to the following steps to calibrate the time of Google authenticator.
Android users:
Click "set" - click "fix time for captcha" - click "synchronize now"