Even when I make a copy of this project file, it still happens. What does this mean?
Hi, welcome to the Magix forums.
On the face of it it would appear your project file is "empty" aka corrupted. However the empty timeline is not normal; try resetting your windows space by hitting Window>Window arrangement>Reset window arrangement (shortcut f9).
If that does not resolve your problem please read this post and give us all the information requested there. Then please explain step by step how this project was created (format of inputted video files, what changes you made to them, intended export format, indeed any information which might help to explain the situation).
Jeff
Forum Moderator