Scroll Not Displaying Properly on yorkie.dev

[hackerwins]

What happened:

When accessing https://yorkie.dev, the ability to scroll up and down is present. However, the scrollbar is not displayed correctly. It would be good to display the scrollbar, enabling users to comprehend the entire page size and their current position.

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

The problem also appears in the dashboard:
https://github.com/yorkie-team/dashboard

Environment:

• Operating system: MacOS
• Browser and version: Chrome latest version