Your requirements could not be resolved to an installable set of packages. Problem 1 - heimrichhannot/contao-test-utilities-bundle[0.1.0, ..., 0.1.4] require php ^7.1 -> your php version (8.2.8) does not satisfy that requirement. - heimrichhannot/contao-test-utilities-bundle[0.1.5, ..., 0.1.6] require contao/core-bundle ^4.4 -> found contao/core-bundle[4.4.0, ..., 4.13.29] but it conflicts with your root composer.json require (5.1.*). - Root composer.json requires heimrichhannot/contao-test-utilities-bundle ^0.1 -> satisfiable by heimrichhannot/contao-test-utilities-bundle[0.1.0, ..., 0.1.6].