It should be a system problem. The attachment of the paper prompts that "this file does not exist, and the file name is empty". The solution is that uploading papers below 1 IE8.0 is unsuccessful. The reason may be that the paper document is open on the Windows desktop. The thesis document is on the mobile hard disk. The solution is to close the document, copy it to any computer disk and upload it.

The solution to the unsuccessful upload of version 2 IE8.0 or above is to set the option value of "Upload file to the local directory path of the server" to enable in the security settings of IE8.0, and click Internet Options-Secure Internet-Custom Level-Set Other Options in the IE browser tool to exit the file and reopen the browser. Other browsers changed the speed mode to compatibility mode.