[phpBB Debug] PHP Warning: in file [ROOT]/vendor/composer/ClassLoader.php on line 444: include([ROOT]/vendor/ocramius/proxy-manager/src/ProxyManager/ProxyGenerator/Assertion/CanProxyAssertion.php): failed to open stream: No such file or directory
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/composer/ClassLoader.php on line 444: include(): Failed opening '[ROOT]/vendor/ocramius/proxy-manager/src/ProxyManager/ProxyGenerator/Assertion/CanProxyAssertion.php' for inclusion (include_path='.:/usr/lib/php5.5')

Fatal error: Class 'ProxyManager\ProxyGenerator\Assertion\CanProxyAssertion' not found in /homepages/17/d107619348/htdocs/typo3cms/forum_stammtisch/phpBB3/vendor/ocramius/proxy-manager/src/ProxyManager/ProxyGenerator/LazyLoadingValueHolderGenerator.php on line 62