1: There are many schools uploading data these days, and many students are crowding to log in.

2. The server of Shandong education cloud service platform is not very good. You can't process too much data at the same time or let multiple people log in, upload, submit and modify data at the same time.

3. In order to reduce the burden of data processing and enable the data submitted by the school to be uploaded normally, the website administrator may turn off some functions voluntarily, resulting in students being unable to open the website.

The above only represents personal views.