How To Fix Class Barryvdh\Debugbar\ServiceProvider Not Found ::

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Problem

When running php composer install --no-dev --prefer-source --no-interaction --no-progress --optimize-autoloader to install packages in a production setup, an error occurs: class 'Barryvdh\Debugbar\ServiceProvider' not found.

Even though the package “barryvdh/laravel-debugbar” is only required in development (it is listed only in require-dev), this error won’t disappear, and it makes you think “what’s wrong with my setup?”

Class Not Found When Using composer install --no-dev, Even When It Is Only Listed In ‘require-dev’ In package.json — Class Not Found When Using `composer install --no-dev`, Even When It Is Only Listed In ‘require-dev’ In package.json

How To Fix It

Remove the “barryvdh/laravel-debugbar” package: composer remove barryvdh/laravel-debugbar.
Run php artisan config:cache to clear all debugbar configurations.
Remove Barryvdh\Debugbar\ServiceProvider from config/app.php. (For Laravel 11 or newer, add the ServiceProvider in bootstrap/providers.php. For Laravel 10 or older, add the ServiceProvider in config/app.php.)
Re-add the “barryvdh/laravel-debugbar” package as a development requirement: composer require barryvdh/laravel-debugbar --dev.

References:

How To Fix Class Barryvdh\Debugbar\ServiceProvider Not Found

How to fix the ‘Class ‘Barryvdh\Debugbar\ServiceProvider’ not found’ error (this error appears even when you don’t need it in production)

Table of Contents

Problem

How To Fix It