I had a similar case and I did the same experiment that I did for the past post and determined that the website that you are using is rendered dynamically and thus making it not possible to be scraped using Google Sheets alone. Kindly visit the post below for more information and possible work around.
To prove that the site is indeed a dynamic site, I turned off Javascript on my browser and confirmed that the contents of the website in concern are dynamically rendered as when I turn off Javascript, the contents did not load at all, See images below.
References: Disable JavaScript