无法在 Xcode 中打开助理编辑器

我无法在 Xcode 项目中打开助手编辑器，当我打开其他项目时，它们工作得非常好.

I am not able to open the assistant editor in Xcode project and when I opened my other projects they were working absolutely fine.

我在我的项目中创建了一些新的视图控制器，之后我无法打开助理编辑器.

I have create some new view controllers in my project and after that I am not able to open the assistant editor.

我试图打开的助理编辑器侧面有一个锁定图标.

There was a lock icon on the side of the assistant editor that I tried to open.

当我尝试解锁它显示的锁定图标时:

When I tried to unlock the lock icon it showed:

该文件是远程资源.尝试制作本地副本.

The file is a remote resource. Try making a local copy.

任何帮助将不胜感激！感谢您的帮助！

Any help will be highly appreciated! Thanks for the help!