Can't deactivate composer anymore

[thmsklngr]

Hi,

I just installed composer for my own curiosity on my (unfortunately) production website, which is currently on version 2.11.13.

I skipped the migration part to get into the package manager and then tried to use "Swtich back to old client". I then confirmed my action by clicking the last button. The result itself is not very promising:

Fatal error: Could not load class ContaoCommunityAlliance\ComposerInstaller\ModuleInstaller in …/system/functions.php on line 105
#0 [internal function]: _error(256, 'Could not load ...', '/kunden/373305...', 105, Array)
#1 …/system/functions.php(105): trigger_error('Could not load ...', 256)
#2 [internal function]: __autoload('ContaoCommunity...')
#3 phar://…/composer/composer.phar/src/Composer/Plugin/PluginManager.php(231): spl_autoload_call('ContaoCommunity...')
#4 phar://…/composer/composer.phar/src/Composer/Installer/PluginInstaller.php(65): Composer\Plugin\PluginManager->registerPackage(Object(Composer\Package\CompletePackage))
#5 phar://…/composer/composer.phar/src/Composer/Installer/InstallationManager.php(153): Composer\Installer\PluginInstaller->install(Object(Composer\Repository\InstalledFilesystemRepository), Object(Composer\Package\CompletePackage))
#6 phar://…/composer/composer.phar/src/Composer/Installer/InstallationManager.php(140): Composer\Installer\InstallationManager->install(Object(Composer\Repository\InstalledFilesystemRepository), Object(Composer\DependencyResolver\Operation\InstallOperation))
#7 phar://…/composer/composer.phar/src/Composer/Installer.php(510): Composer\Installer\InstallationManager->execute(Object(Composer\Repository\InstalledFilesystemRepository), Object(Composer\DependencyResolver\Operation\InstallOperation))
#8 phar://…/composer/composer.phar/src/Composer/Installer.php(210): Composer\Installer->doInstall(Object(Composer\Repository\InstalledFilesystemRepository), Object(Composer\Repository\CompositeRepository), Object(Composer\Repository\PlatformRepository), Array, false)
#9 …/system/modules/!composer/ContaoCommunityAlliance/Contao/Composer/Controller/UndoMigrationController.php(68): Composer\Installer->run()
#10 …/system/modules/!composer/ContaoCommunityAlliance/Contao/Composer/ClientBackend.php(200): ContaoCommunityAlliance\Contao\Composer\Controller\UndoMigrationController->handle(Object(Input))
#11 …/system/modules/backend/Backend.php(239): ContaoCommunityAlliance\Contao\Composer\ClientBackend->generate()
#12 …/contao/main.php(120): Backend->getBackendModule('composer')
#13 …/contao/main.php(230): Main->run()
#14 {main}

I don't have any clue on how to get rid now of composer.

Here are some settings from the export mode window:
{
"name": "contao/core",
"description": "Contao Open Source CMS",
"license": "LGPL-3.0+",
"version": "2.11.13",
"type": "metapackage",
"require": {
"contao-community-alliance/composer": "*"
},
"scripts": {
"pre-update-cmd": "ContaoCommunityAlliance\ComposerInstaller\ModuleInstaller::preUpdate",
"post-update-cmd": "ContaoCommunityAlliance\ComposerInstaller\ModuleInstaller::postUpdate",
"post-autoload-dump": "ContaoCommunityAlliance\ComposerInstaller\ModuleInstaller::postAutoloadDump"
},
"config": {
"preferred-install": "dist",
"cache-dir": "cache"
},
"repositories": [
{
"type": "composer",
"url": "http://legacy-packages-via.contao-community-alliance.org/"
},
{
"type": "artifact",
"url": "packages/"
}
],
"extra": {
"contao": {
"migrated": "skipped"
}
}
}

Any hints on how to solve this would be great.

Regards, Thomas

[stof]

Composer itself is not something you install in your website. It is a CLI tool. I think you confuse Composer with a module for your CMS (which could use Composer internally). This should be reported to the support team of the CMS module instead

[thmsklngr]

I'm very sorry, I used the wrong section.