What does the yellow exclamation mark mean when adding attachments to the 12345 processing system?

It prompts that the uploaded attachment is too large and the upload failed.

12345 When adding an attachment in the system, a yellow exclamation mark appears, indicating that the uploaded attachment is too large and the upload failed. It is recommended to contact the administrator, relevant person in charge, and the collaborative office vendor to handle the matter.

The 12345 processing system, that is, the government service convenience hotline, refers to the special handling hotline set up by the people's governments of various cities, consisting of telephone numbers, mayor's mailboxes, mobile text messages, mobile clients, Weibo, WeChat, etc. A public service platform.