Enable scroll effect on "link to section" function

Hi dear Web flower,

I have watched all tutorial videos, and crawl on the forum before seeking for help here.

In the tutorial https://university.webflow.com/article/anchor-links, the page scrolls to it’s section smoothly. I did exactly the same, however, after clicking on the link, it did take me to another section of the page, but it appears with one “boom” without any scrolling effect.

I have checked all the settings I can check, wonder if there’s something missing that I did not see, any ideas?

(It’s a fairly simple function but I’ve struggled with it for hours today, hope to see someone wiser to find better ideas.)

Thank you~~

Here is my site Read-Only (Work_BiSmart page): https://preview.webflow.com/preview/ichuliao?preview=a76c97b5640d792355f198735ac3df65