Adobe Premiere Pro 26.0.1 cant create shapes or areas for mosaic effect

In the latest version, I'm trying to use the Mosaic effect to cover faces in video. Previously, when you selected the Mosaic option in an Adjustment Layer, it gave you the option to create shapes and resize and rotate them as needed. Now, in both the new Mosaic effect and the Mosaic Legacy effect, the option to create shapes or masks has disappeared.