We can't know. We know nothing about your comp, your footage, your text and so on. Provide screenshots and the necessary info.
Seeing as im going now, I cant do that now, but I can give you this: The text is completely out of place from where it is meant to be and it is only visible at the start of the clip.
If you have a good camera track and you establish a ground plane and origin and you target is on a plane with solid geometry and you are using the active camera view then Camera Tracking works. If you are on any other view or you did not follow the proper procedure then it will not work.
Thanks, I've also found out that if I use a track null and then add text for element 3D (which I use for 3D text), I can take the position of the null and use it on element 3D, and the text is perfect.