This may be due to problems in the installation process. You can download and install it again.

the first step of registration and login: official website has a login and free registration button in the upper right corner. If you have an account, you can directly click the login button to log in. If you don't have an account, please click the registration button to register. Step 2: Click Register to enter the registration interface. There are three ways to register: 1. Ordinary registration: enter your mobile phone number or email address, click "Get Verification Code" and the system will send a verification code to your mobile phone or email address. After receiving the verification code, enter the correct verification code, password, confirmation password, industry selection and invitation code (not required, if there is no invitation code, you can leave it blank).