I am trying to create a custom stat block via Studio -> Sheets & Blocks. In the tutorial there's a set of options that come up on the right side of the screen to create a new stat custom stat block. But mine is empty, all I have is the search functionality, which is empty. This may be user-error as I'm new to the dashboard, but could not find a solution. I've tried clearing my browser cache and using different browsers.

Click on studio, then select Sheets & Blocks.