Your requirements could not be resolved to an installable set of packages.
Problem 1
- symfony/browser-kit[v4.4.0-BETA1, ..., v4.4.8] require php ^7.1.3 -> your php version (8.1.24) does not satisfy that requirement.
- Root composer.json requires drupal/helfi_platform_config * -> satisfiable by drupal/helfi_platform_config[dev-099203124a33785b50f16d6dea5848ba46ef1631].
- Conclusion: don't install drupal/core 10.1.5 (conflict analysis result)
- Root composer.json requires drupal/core-dev ^9.5 -> satisfiable by drupal/core-dev[9.5.0-beta1, ..., 9.5.x-dev].
- drupal/helfi_platform_config dev-099203124a33785b50f16d6dea5848ba46ef1631 requires drupal/core ^10.1.5 -> satisfiable by drupal/core[10.1.5, 10.1.x-dev, 10.2.x-dev].
- drupal/core[10.1.x-dev, ..., 10.2.x-dev] require symfony/http-kernel ^6.3 -> satisfiable by symfony/http-kernel[v6.3.0-BETA1, ..., 6.4.x-dev].
- symfony/http-kernel[v6.3.0-BETA1, ..., 6.4.x-dev] conflict with symfony/browser-kit <5.4.
- drupal/core-dev[9.5.0-beta1, ..., 9.5.x-dev] require symfony/browser-kit ^4.4 -> satisfiable by symfony/browser-kit[v4.4.0-BETA1, ..., 4.4.x-dev].
- Conclusion: don't install symfony/browser-kit v4.4.44 (conflict analysis result)