Php Symfony2返回的类在实体加载时不存在

我试图从我的文件实体加载对象，但symfony不断返回 “Class Frontend\FolderBundle\Entity\Role不存在”，但我可以从子文件夹实体使用它，而不会出现任何问题或警告

我拥有以下实体的：

Frontend\FolderBundle\Entity\File:
type: entity
table: file
fields:
id:
  type: integer
  id: true
  generator:
    strategy: AUTO
filename:
  type: text
user:
  type: integer
manyToOne:
folder:
    targetEntity: Frontend\FolderBundle\Entity\Subfolder
    inversedBy: files
    joinColumn:
      name: subfolder_id
      referencedColumnName: id
lifecycleCallbacks: {  }


Frontend\FolderBundle\Entity\Subfolder:
type: entity
table: subfolder
fields:
id:
  type: integer
  id: true
  generator:
    strategy: AUTO
name:
  type: string
  length: 255
manyToOne:
    folder:
        targetEntity: Folder
        inversedBy: subfolder
        joinColumn:
            name: folder_id
            referencedColumnName: id
oneToMany:
    files:
        targetEntity: File
        mappedBy: folder
manyToMany:
roles:
  targetEntity: Frontend\UserBundle\Entity\Role
  inversedBy: subfolders
  joinTable:
    name: folder_rights
    joinColumns:
      subfolder_id:
        referencedColumnName: id
    inverseJoinColumns:
      role_id:
        referencedColumnName: id
lifecycleCallbacks: {  }

从子文件夹中获取文件夹中角色的所有内容都可以正常工作

我已经清除了应用程序/缓存和条令缓存，但这不起作用

如果您需要更多信息/代码片段，请询问，我会提供

---

提前感谢，

错误在Subfolder.php实体中。存在一个addRole函数，该函数引用了具有正确实体的错误捆绑包