Could not find the entrypoints file from Webpack: the file ".../public/build/entrypoints.json" does not exist
It seems your entrypoints.json has not generated by encore.
Do verify your webpack.config.js setup correctly(it will be present at root). Like
// webpack.config.jsvar Encore = require('@symfony/webpack-encore');Encore // directory where compiled assets will be stored .setOutputPath('public/build/') // public path used by the web server to access the output path .setPublicPath('/build') .addEntry('app', './assets/js/app.js') // ...;// ...Then try run yarn encore dev --watch
Here you can follow for setting up project instructions.
https://symfony.com/doc/current/frontend/encore/simple-example.html
I had the same issue!
type this cmd : yarn encore dev --watch
Then run your server and everything should be fine.
I had the same problem and forgot to type the install command for bootstrap:
yarn add bootstrap --devDid you type this command?