[phpBB Debug] PHP Warning: in file [ROOT]/vendor/composer/ClassLoader.php on line 571: include(): Failed opening '[ROOT]/vendor/composer/../symfony/yaml/Unescaper.php' for inclusion (include_path='.:/opt/alt/php82/usr/share/pear:/opt/alt/php82/usr/share/php:/usr/share/pear:/usr/share/php')

Fatal error: Uncaught Error: Class "Symfony\Component\Yaml\Unescaper" not found in /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Inline.php:388 Stack trace: #0 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Inline.php(325): Symfony\Component\Yaml\Inline::parseQuotedScalar() #1 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Inline.php(126): Symfony\Component\Yaml\Inline::parseScalar() #2 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(749): Symfony\Component\Yaml\Inline::parse() #3 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(249): Symfony\Component\Yaml\Parser->parseValue() #4 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(522): Symfony\Component\Yaml\Parser->doParse() #5 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(378): Symfony\Component\Yaml\Parser->parseBlock() #6 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(522): Symfony\Component\Yaml\Parser->doParse() #7 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(378): Symfony\Component\Yaml\Parser->parseBlock() #8 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(522): Symfony\Component\Yaml\Parser->doParse() #9 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(378): Symfony\Component\Yaml\Parser->parseBlock() #10 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(142): Symfony\Component\Yaml\Parser->doParse() #11 /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Parser.php(78): Symfony\Component\Yaml\Parser->parse() #12 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(661): Symfony\Component\Yaml\Parser->parseFile() #13 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(117): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->loadFile() #14 /home/G/geobergenno/subdomener/forum/vendor/symfony/config/Loader/FileLoader.php(153): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->load() #15 /home/G/geobergenno/subdomener/forum/vendor/symfony/config/Loader/FileLoader.php(90): Symfony\Component\Config\Loader\FileLoader->doImport() #16 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(195): Symfony\Component\Config\Loader\FileLoader->import() #17 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(127): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->parseImports() #18 /home/G/geobergenno/subdomener/forum/vendor/symfony/config/Loader/FileLoader.php(153): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->load() #19 /home/G/geobergenno/subdomener/forum/vendor/symfony/config/Loader/FileLoader.php(90): Symfony\Component\Config\Loader\FileLoader->doImport() #20 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(195): Symfony\Component\Config\Loader\FileLoader->import() #21 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(127): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->parseImports() #22 /home/G/geobergenno/subdomener/forum/phpbb/di/extension/core.php(57): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->load() #23 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Compiler/MergeExtensionConfigurationPass.php(71): phpbb\di\extension\core->load() #24 /home/G/geobergenno/subdomener/forum/vendor/symfony/http-kernel/DependencyInjection/MergeExtensionConfigurationPass.php(39): Symfony\Component\DependencyInjection\Compiler\MergeExtensionConfigurationPass->process() #25 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/Compiler/Compiler.php(140): Symfony\Component\HttpKernel\DependencyInjection\MergeExtensionConfigurationPass->process() #26 /home/G/geobergenno/subdomener/forum/vendor/symfony/dependency-injection/ContainerBuilder.php(789): Symfony\Component\DependencyInjection\Compiler\Compiler->compile() #27 /home/G/geobergenno/subdomener/forum/phpbb/di/container_builder.php(448): Symfony\Component\DependencyInjection\ContainerBuilder->compile() #28 /home/G/geobergenno/subdomener/forum/phpbb/di/container_builder.php(162): phpbb\di\container_builder->load_extensions() #29 /home/G/geobergenno/subdomener/forum/common.php(127): phpbb\di\container_builder->get_container() #30 /home/G/geobergenno/subdomener/forum/app.php(23): include('/home/G/geoberg...') #31 {main} thrown in /home/G/geobergenno/subdomener/forum/vendor/symfony/yaml/Inline.php on line 388