1. Confirm network connection: First, make sure that your computer is connected to a stable network. You can try to open other websites to confirm whether the network is normal.

2. Clear the browser cache: expired or damaged cache files may make it impossible to log in to the website. Clearing the browser cache can try to solve this problem.

3. Check firewalls and security software: Some firewalls and security software may prevent you from visiting specific websites. You can try turning off the firewall or security software, and then log in to the website again.