An error occurs when an image larger than 4M is uploaded using the "ep_image_upload" plugin

[wangashui]

The error content is as follows:

You are disconnected.
This could be due to a wrong server configuration or some other unexpected behavior. Please contact the service administrator, if you feel this is an error. Try to reconnect in order to continue editing.

[SamTV12345]

Could this be because you were rate limited. You can set in settings.json how much people can upload at once.