Contao Manager: The background task has stopped unexpectedly

Hi zusammen...

Beim Umzug von einer Contao 4.4 Instanz auf einen anderen Server bekomme ich folgende Fehlermeldung im Contao Manager:

Code:

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$ /opt/plesk/php/7.1/bin/php '-q' '/srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php' 'composer' 'install' '--prefer-dist' '--no-dev' '--no-progress' '--no-suggest' '--no-ansi' '--no-interaction' '--optimize-autoloader' 2>&1

Using config.component-dir has been deprecated. Please use extra.contao-component-dir instead.
Loading composer repositories with package information
Installing dependencies from lock file
Package operations: 3 installs, 14 updates, 0 removals
  - Updating beberlei/assert (v3.2.0 => v3.2.1):
In VcsDownloader.php line 242:
                                                                             
  Source directory /srv/www/vhosts/ecosens.ch/httpdocs/vendor/beberlei/assert 
  has uncommitted changes.                                                   
                                                                             

install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [--no-suggest] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--ignore-platform-reqs] [--] [<packages>]...

InvalidArgumentException: Config file "/srv/www/vhosts/ecosens.ch/httpdocs/contao-manager/composer-install.set.json" does not exist. in phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/terminal42/background-process/src/AbstractProcess.php:52
Stack trace:
#0 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/terminal42/background-process/src/ProcessRunner.php(175): Terminal42\BackgroundProcess\AbstractProcess::readConfig('/srv/www/vhosts...')
#1 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/terminal42/background-process/src/ProcessRunner.php(106): Terminal42\BackgroundProcess\ProcessRunner->loadConfig()
#2 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/terminal42/background-process/src/ProcessRunner.php(53): Terminal42\BackgroundProcess\ProcessRunner->wait(1)
#3 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/terminal42/background-process/src/Command/ProcessRunnerCommand.php(36): Terminal42\BackgroundProcess\ProcessRunner->run()
#4 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/symfony/console/Command/Command.php(255): Terminal42\BackgroundProcess\Command\ProcessRunnerCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#5 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/symfony/console/Application.php(978): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#6 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/symfony/console/Application.php(255): Symfony\Component\Console\Application->doRunCommand(Object(Terminal42\BackgroundProcess\Command\ProcessRunnerCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#7 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/api/ApiApplication.php(76): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#8 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/vendor/symfony/console/Application.php(148): Contao\ManagerApi\ApiApplication->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#9 phar:///srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php/api/console(84): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput))
#10 /srv/www/vhosts/ecosens.ch/httpdocs/web/contao-manager.phar.php(54): require('phar:///srv/www...')
#11 {main}
# Process terminated with exit code 1
# Result: General error


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### The background task has stopped unexpectedly ###

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Kann sich da jemand vielleicht einen Reim drauf machen? Ursprünglich wurde Contao mittels Command Line und Composer installiert, das hab ich aber auf dem jetzigen Server leider nicht zur Verfügung. :-/

Danke und Gruss

Marcel