1. Check the network connection: Make sure the network connection is stable and try to refresh the page. The problem still exists, please try using other network connections, such as using mobile data or connecting to other Wi-Fi networks.
2. Contact the examination institution: If you can't solve it through the above methods, directly contact the imperial music theory examination institution or relevant officials to reflect their problems and ask for help.
3. Check browser settings: Sometimes, browser settings will affect the page display. Try using a different browser or clearing the browser's cache and cookie, and then reload the page.