The battery may need to be replaced. The Lithium-ion batteries in laptops gradually lose their ability to hold a charge as time goes on. This means that your charging port may be working (hence the green light), but the battery itself is not functioning well.
Most laptop batteries need replacing after 2 or 3 years, especially when subject to the power-intensive applications needed by architects.
All laptop batteries are removable, but unfortunately, ASUS doesn’t make it easy. I included a link to a YouTube video on how to perform the repair:
[https://www.youtube.com/watch?v=X5KwwHGvbuo|https://www.youtube.com/watch?v=X5KwwHGvbuo]