Can you share your composer.json file?

Can you share your composer.json file?

Yes.

{
    "type": "project",
    "license": "proprietary",
    "require": {
        "php": "^7.2.5",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "doctrine/annotations": "^1.10",
        "google/apiclient": "2.0",
        "sensio/framework-extra-bundle": "^5.5",
        "symfony/console": "5.0.*",
        "symfony/dotenv": "5.0.*",
        "symfony/flex": "^1.3.1",
        "symfony/form": "5.0.*",
        "symfony/framework-bundle": "5.0.*",
        "symfony/security-bundle": "5.0.*",
        "symfony/serializer-pack": "^1.0",
        "symfony/string": "5.0.*",
        "symfony/translation": "5.0.*",
        "symfony/validator": "5.0.*",
        "symfony/yaml": "5.0.*"
    },
    "require-dev": {
        "symfony/maker-bundle": "^1.15"
    },
    "config": {
        "preferred-install": {
            "*": "dist"
        },
        "sort-packages": true
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests\\": "tests/"
        }
    },
    "replace": {
        "paragonie/random_compat": "2.*",
        "symfony/polyfill-ctype": "*",
        "symfony/polyfill-iconv": "*",
        "symfony/polyfill-php72": "*",
        "symfony/polyfill-php71": "*",
        "symfony/polyfill-php70": "*",
        "symfony/polyfill-php56": "*"
    },
    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install %PUBLIC_DIR%": "symfony-cmd"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },
    "conflict": {
        "symfony/symfony": "*"
    },
    "extra": {
        "symfony": {
            "allow-contrib": false,
            "require": "5.0.*"
        }
    }
}

Well, your kernel still tries to load the DoctrineBundle (for example in config/bundles.php) while you didn't list the doctrine/doctrine-bundle package in your composer.json file.

I didn't do anything. It's just a Symfony project from composer create-project. And I installed the Doctrine bundle running
composer require symfony/orm-pack composer require --dev symfony/maker-bundle And the project is running fine in Dev and also running fine in APP_ENV=prod.

I just follow this doc to install Doctrine

How can I fix it?

Looks like somehow the ORM pack was removed. Does running composer require symfony/orm-pack again help?

composer require symfony/orm-pack

I don't know why it was removed from the composer.json. But after running composer require symfony/orm-pack It just put it back:

composer require symfony/orm-pack
Using version ^1.0 for symfony/orm-pack
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Restricting packages listed in "symfony/symfony" to "5.0.*"
Nothing to install or update
Package zendframework/zend-code is abandoned, you should avoid using it. Use laminas/laminas-code instead.
Package zendframework/zend-eventmanager is abandoned, you should avoid using it. Use laminas/laminas-eventmanager instead.
Writing lock file
Generating autoload files
ocramius/package-versions: Generating version class...
ocramius/package-versions: ...done generating version class
45 packages you are using are looking for funding.
Use the composer fund command to find out more!
Executing script cache:clear [OK]
Executing script assets:install public [OK]

Then composer install --no-dev --optimize-autoloader works fine:

composer install --no-dev --optimize-autoloader
Loading composer repositories with package information
Installing dependencies from lock file
Package operations: 0 installs, 0 updates, 2 removals

• Removing symfony/maker-bundle (v1.15.0)
• Removing nikic/php-parser (v4.3.0)
  Package zendframework/zend-code is abandoned, you should avoid using it. Use laminas/laminas-code instead.
  Package zendframework/zend-eventmanager is abandoned, you should avoid using it. Use laminas/laminas-eventmanager instead.
  Generating optimized autoload files
  ocramius/package-versions: Generating version class...
  ocramius/package-versions: ...done generating version class
  44 packages you are using are looking for funding.
  Use the composer fund command to find out more!
  Executing script cache:clear [OK]
  Executing script assets:install public [OK]

Thanks for your support :)

Without actually knowing what output your received before or what might have happened additionally that's indeed hard to say. :) But I am glad that you managed to resolve your issue.

Hello,

In short if you have issue of missing package / (class not found) after running the above command -> the solution is just add that package to section "require" (this is production sections) or run "composer require symfony/yourmissingpackageorclass" that will fix it.

A late one, but thank you for sharing. I found out that when going into production, there are some packages you have to move from dev to prod for example:

in your composer.json

"require": { package-from-dev:version, package2:version, package3:version}
"require-dev": { package2:version, package3:version}

this post helps me.