Couldn't refresh my schemas and show the files

SQL
1

截圖 2022-01-24 下午10.27.51
截圖 2022-01-24 下午10.27.512272×1680 179 KB

I couldn’t refresh my schemas

As Mosh shared, it should show different schemas and I’ve downloaded them as well.
The chapter is Get Started - 5 Creating the databases.

Thanks