Getting a lot of Psalm errors "UndefinedClass"

Hey,
I’m trying to setup Psalm for my app and get a lot of errors like

composer require --dev nextcloud/ocp:dev-stable30
composer run psalm
ERROR: UndefinedClass - lib/Command/Run.php:24:19 - Class, interface or enum named OC\Core\Command\Base does not exist (see https://psalm.dev/019)
class Run extends Base {


ERROR: UndefinedClass - lib/Controller/BackgroundJobController.php:29:39 - Class, interface or enum named OCP\AppFramework\Controller does not exist (see https://psalm.dev/019)
class BackgroundJobController extends Controller {


ERROR: UndefinedClass - lib/Controller/SettingsController.php:27:34 - Class, interface or enum named OCP\AppFramework\Controller does not exist (see https://psalm.dev/019)
class SettingsController extends Controller {


ERROR: UndefinedClass - lib/Cron/Cleanup.php:23:23 - Class, interface or enum named OCP\BackgroundJob\TimedJob does not exist (see https://psalm.dev/019)
class Cleanup extends TimedJob {


ERROR: UndefinedDocblockClass - lib/Service/CleanupService.php:25:11 - Docblock-defined class, interface or enum named OCP\IDBConnection does not exist (see https://psalm.dev/200)
	/** @var IDBConnection */


ERROR: UndefinedDocblockClass - lib/Service/CleanupService.php:28:11 - Docblock-defined class, interface or enum named OCP\ILogger does not exist (see https://psalm.dev/200)
	/** @var ILogger */
[...]

I have the default minimal psalm config

<?xml version="1.0"?>
<psalm
    totallyTyped="true"
    errorLevel="5"
    resolveFromConfigFile="true"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="https://getpsalm.org/schema/config"
    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
>
    <!-- errorBaseline="tests/psalm-baseline.xml" -->
    <projectFiles>
        <directory name="lib" />
        <ignoreFiles>
            <directory name="vendor" />
            <!-- <directory name="lib/Vendor" /> -->
        </ignoreFiles>
    </projectFiles>
    <extraFiles>
        <directory name="vendor" />
        <ignoreFiles>
            <!-- <directory name="vendor/phpunit/php-code-coverage" /> -->
        </ignoreFiles>
    </extraFiles>
    <issueHandlers>
        <UndefinedClass>
            <errorLevel type="suppress">
                <referencedClass name="OC" />
            </errorLevel>
        </UndefinedClass>
        <UndefinedDocblockClass>
            <errorLevel type="suppress">
                <referencedClass name="Doctrine\DBAL\Schema\Schema" />
                <referencedClass name="Doctrine\DBAL\Schema\SchemaException" />
                <referencedClass name="Doctrine\DBAL\Driver\Statement" />
                <referencedClass name="Doctrine\DBAL\Schema\Table" />
            </errorLevel>
        </UndefinedDocblockClass>
    </issueHandlers>
</psalm>

and this is my composer.json

{
	"name": "synyx/cleanup",
	"type": "project",
	"license": "AGPLv3",
	"require-dev": {
		"nextcloud/coding-standard": "^1.2",
		"psalm/phar": "^5.26.1"
	},
	"config": {
		"platform": {
			"php": "8.1"
		},
		"optimize-autoloader": true,
		"classmap-authoritative": true,
		"sort-packages": true,
		"allow-plugins": {
			"bamarni/composer-bin-plugin": true
		}
	},
	"autoload-dev": {
		"psr-4": {
			"OCA\\Cleanup\\": "lib/"
		}
	},
	"require": {
		"php": ">=8.0 <=8.3",
		"bamarni/composer-bin-plugin": "^1.8",
		"dekor/php-array-table": "^2.0",
		"nesbot/carbon": "^2.72"
	},
	"scripts": {
		"cs:check": "php-cs-fixer fix --dry-run --diff",
		"cs:fix": "php-cs-fixer fix",
		"lint": "find . -name \\*.php -not -path './vendor*/*' -print0 | xargs -0 -n1 php -l",
		"psalm": "psalm.phar",
		"psalm:fix": "psalm.phar --alter --issues=InvalidReturnType,InvalidNullableReturnType,MismatchingDocblockParamType,MismatchingDocblockReturnType,MissingParamType,InvalidFalsableReturnType",
		"post-install-cmd": [
			"@composer bin all install --ansi",
			"composer dump-autoload"
		],
		"post-update-cmd": [
			"@composer bin all update --ansi",
			"composer dump-autoload"
		]
  	},
	"extra": {
		"bamarni-bin": {
            "bin-links": true,
            "forward-command": false
        }
    }
} 

Best regards
Jonas

Looks okay at first sight. Can you push the project to GitHub?