"No selected property has expressions" is not an error message, it is just telling you that there is no expression currently written for that property. In the image you shared, the selected property is Rotation. This tutorial is for After Effects, but you may be able to use the expression shared in this video on the Rotation property in Premiere Pro. https://adobe.ly/43pz8Px
i dont know if you understand portuguese but it says "After Effects error: the cached preview needs two or more frames for playback", and when I selected the two keyframes I have, this error still appears, what should i do now?