Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.1 but your php version (8.4.0RC1) does not satisfy that requirement. Problem 2 - vimeo/psalm[5.17.0, ..., 5.26.1] require php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - Root composer.json requires vimeo/psalm ^5.17.0 -> satisfiable by vimeo/psalm[5.17.0, ..., 5.26.1].

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.1 but your php version (8.4.0RC1) does not satisfy that requirement. Problem 2 - vimeo/psalm[5.17.0, ..., 5.26.1] require php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - Root composer.json requires vimeo/psalm ^5.17.0 -> satisfiable by vimeo/psalm[5.17.0, ..., 5.26.1].

src/ConfigInjector/AbstractInjector.php:187:17: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

src/CreateHandler/CreateHandler.php:49:30: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

src/CreateHandler/CreateTemplate.php:73:25: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

src/CreateHandler/CreateTemplate.php:88:13: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

src/MigrateInteropMiddleware/ConvertInteropMiddleware.php:105:13: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

src/MigrateInteropMiddleware/ConvertInteropMiddleware.php:120:13: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

test/Composer/FileSystemBasedComposerPackageTest.php:85:20: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

test/Composer/FileSystemBasedComposerPackageTest.php:110:20: RiskyTruthyFalsyComparison: Operand of type null|string contains type string, which can be falsy and truthy. This can cause possibly unexpected behavior. Use strict comparison instead. (see https://psalm.dev/356)

test/Factory/ConfigInjectorTest.php:86:68: UndefinedInterfaceMethod: Method Countable::offsetGet does not exist (see https://psalm.dev/181)