Add CIB rasters to mosaic dataste doesn't work in Pro 2.9

[aarismendi]

In Pro 2.9 I tried Imagery Basemap Tools.tbx/Add CIB Rasters To Mosaic Dataset and it won't validate the Mosaic Dataset I dragged over that was created by Imagery Basemap Tools.tbx/Create CIB Mosaic Dataset. The GUI marks the mosaic dataset input field as invalid and shows the error 000816 The tool is not valid. I'm then also not able to drag over an input folder.