Please start AutoCAD then type CUI on the command line so that Customize User Interface dialog box is displayed. In the top left section, expand the Partial Customization Files and check if our product is on the list and if it is marked as Unresolved.
If you have our product name on the list and it is marked as Unresolved, please right click on it and unload it. Click on OK to close CUI dialog box and then close AutoCAD. Use our desktop shortcut to start our product in AutoCAD and confirm that this time you can see our product toolbar or ribbon.