Reason 1. You installed a personal subscription version of Superstar Reader. Solution: Please log on to the website of Superstar Digital Library and click "Reader Download" on the website to download and reinstall the reader.
Reason 2: You installed the free version, but your computer is outside the IP of the provincial library. Solution: First, open the reader, click Register above, and register your own superstar reader account password. If you open it later, there will be no login box if you log in directly.
I hope I can help you!