Do you know how to use the package manager pacman in the terminal in Manjaro, generally?
The information posted above was from the AUR, they were not recommendations, or instructions; it was meant for your reference – ideally, for you to read, and gather information.
This too, is an important link for you to follow. It tells you what other forum members need from you in order to help you more. If you ignore it, you won’t get much help: