Ensure you have the SketchUp Pro 2020 installer. License keys are version-specific; a 2020 key will not work on 2019 or 2021 versions.
This usually happens if there is a typo (check for extra spaces) or if you are trying to use a license for a different version of SketchUp. Remember, 2020 licenses start with the letter . Deauthorizing Old Machines Ensure you have the SketchUp Pro 2020 installer
Search your inbox for "SketchUp License" or "SketchUp Pro 2020 Order." This email contains both your serial number and authorization code. Ensure you have the SketchUp Pro 2020 installer
Upon launching, the "Welcome to SketchUp" window will appear. Ensure you have the SketchUp Pro 2020 installer