Failed to load resource: net::ERR_CONNECTION_REFUSED

#Failed to load resource: net:: err_connection_union report error
this is because of the file loading error, when I was loading the image, did not show the browser reported error
solution:
1. First, there may be a configuration problem in Nginx to prevent files from being too large to load

2. There may be a problem with the path of the file in your application.properties

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