when i try to create a table or form in project symfony 4 with shell, he tells me that class AnnotationDriver does not exist. without symfony5 upgrade

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i created symfony 4 i created the new twig the execution has been done correctly but when i arrive to the database it tells me In DoctrineHelper.php line 180 Class Doctrine\Persistence\Mapping\Driver\AnnotationDriver doesn't exist I opened the DoctrineHelper.php in line 180 i found the word Annotation but when i added the class menshened above it gives me the error class already exist I have updated the composer but no solution. the version of "doctrine/orm": "2.11.*",is 2.13 i added

 "conflict": {
        "symfony/symfony": "*",
        "doctrine/orm": "2.12.0"
    },

and then updaded the composer but nothing please help me