好的，我正式是个脾气暴躁的人.进一步的搜索显示这是当前已知的错误.

OK, I am officially a numpty. A bit more searching reveals that this is currently a known bug.

https://developers.facebook.com/support/bugs/283375049150375/?disable_redirect = 0

问题是先前授予的权限不适用于新创建的页面，仅适用于现有页面.解决方法是删除所有当前权限(通过API或Graph Explorer)，然后重新启用它们.

The issue is that previously granted permissions do not apply to newly created pages, only existing pages. The workaround is to delete all current permissions (either via the API or Graph Explorer), and then re-enable them.

我已经对此进行了测试，并且可以正常工作.我的问题解决了.我现在可以通过API管理我的新页面.

I have tested this, and it works. My problem is solved. I can now administer my new page via the API.