Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires saschaegerer/phpstan-typo3 ^1.8 -> satisfiable by saschaegerer/phpstan-typo3[1.8.0, ..., 1.10.2]. - saschaegerer/phpstan-typo3 1.10.0 requires typo3/cms-core ^10.4 || ^11.5 || ^12.4 || ^13.0 -> found typo3/cms-core[v10.4.0, ..., 10.4.x-dev, v11.5.0, ..., 11.5.x-dev, v12.4.0, ..., 12.4.x-dev, v13.0.0, ..., 13.4.x-dev] but it conflicts with your root composer.json require (dev-main@dev). - saschaegerer/phpstan-typo3[1.10.1, ..., 1.10.2] require typo3/cms-core ^11.5 || ^12.4 || ^13.0 -> found typo3/cms-core[v11.5.0, ..., 11.5.x-dev, v12.4.0, ..., 12.4.x-dev, v13.0.0, ..., 13.4.x-dev] but it conflicts with your root composer.json require (dev-main@dev). - saschaegerer/phpstan-typo3[1.8.0, ..., 1.8.2] require typo3/cms-core ^10.4 || ^11.5 || ^12.0 -> found typo3/cms-core[v10.4.0, ..., 10.4.x-dev, v11.5.0, ..., 11.5.x-dev, v12.0.0, ..., 12.4.x-dev] but it conflicts with your root composer.json require (dev-main@dev). - saschaegerer/phpstan-typo3 1.8.3 requires typo3/cms-core ^10.4 || ^11.5 || ^12.2 -> found typo3/cms-core[v10.4.0, ..., 10.4.x-dev, v11.5.0, ..., 11.5.x-dev, v12.2.0, ..., 12.4.x-dev] but it conflicts with your root composer.json require (dev-main@dev). - saschaegerer/phpstan-typo3 1.8.4 requires typo3/cms-core ^10.4 || ^11.5 || ^12.3 -> found typo3/cms-core[v10.4.0, ..., 10.4.x-dev, v11.5.0, ..., 11.5.x-dev, v12.3.0, ..., 12.4.x-dev] but it conflicts with your root composer.json require (dev-main@dev). - saschaegerer/phpstan-typo3[1.8.5, ..., 1.9.1] require typo3/cms-core ^10.4 || ^11.5 || ^12.4 -> found typo3/cms-core[v10.4.0, ..., 10.4.x-dev, v11.5.0, ..., 11.5.x-dev, v12.4.0, ..., 12.4.x-dev] but it conflicts with your root composer.json require (dev-main@dev).