As noted above, it's normal for the dough to be a little bit sticky, but it should still be workable. If it's not workable, this is probably either because there's not enough flour, or the butter got too warm. So first, try to weigh the flour if possible. There is already so much variation between cup measuring and brands, and weighing the flour will help ensure proper proportions. Next, try to assess if the dough needs more flour, or if it's too warm. For example, if the butter you used is softened above 70 degrees F (or if you used the microwave softening feature for a bit too long), the butter may be too warm by the time you're working with it. Popping the dough into the fridge will firm the butter slightly, and may help you roll it out. Or, you can add just enough flour to the outside to roll it out, then cut the pieces.