1) Uninstall all the Adobe Apps from your computer including the "Adobe Creative Cloud" App.
Finder, navigate to Applications > Utilities > Adobe Installers.
Then restart your computer
2) Open the "Spotlight Search Bar", using the magnifying glass icon (located in the upper right side of the screen) or press the "Command" + "Space" keys together.
Write "terminal" and press "enter" key to open the program
Write this text on the "Terminal" App
Next, you need to write your computer password to complete the installation
Then write this to run the Adobe Cleaner:
When the program ends, you need to restart the computer.
3) Now, you can install the Adobe Creative Cloud 2020 from the previous page