ADJUSTMENT BRUSH

Good morning people. I'm having a problem with my acr. I wonder if anyone can help me. The ADJUSTMENT BRUSH tool is not working but has not been created. Anyone have a solution for me? Information: I installed a trial version of Photoshop CC 2017 The acr and 9.8 that already comes with CC 2017 Another important note, even though I uninstalling it and installing again. Thanks.