Cli3.0 Solutions:
Failed to Load Resource: net::ERR_FILE_NOT_FOUND
Dist /index.html, the introduction is problematic,

The webPack configuration file cannot be found in the project created by Ue-CLi 3.0, because it is encapsulated by Ue-CLi 3.0. You only need to modify it in the vue.config.js file in the root directory of the project (if the project does not have this file, add one directly in the root directory), and set the baseUrl value to ‘./ ‘, and modify as follows

const webpack = require("webpack");
module.exports = {
    pluginOptions: new webpack.ProvidePlugin({
        jQuery: "jquery",
        $: "jquery"
    }),
    baseUrl: './' // ADD these codes
};

Cli2.x Solutions:
Open config/index.js file and build-> AssetsPublicPath is changed to “./ “, which is preceded by a dot.

build: {
  // Template for index.html
  index: path.resolve(__dirname, '../dist/index.html'),

  // Paths
  assetsRoot: path.resolve(__dirname, '../dist'),
  assetsSubDirectory: 'static',
  assetsPublicPath: './',  // Here
}

Ok, 2. X 3.0 is all done
Please indicate the source of the reprint