Bookdown Error: `Error in site_root(config)`

General
1

When trying to build my book in RStudio I get the error below:

Error: /home/gordon/GitHub/my-notebook already exists and is not empty
Quitting from lines 992-998 (bookdown-demo.Rmd)
Error in site_root(config) :
Cannot find a website under the current working directory or upper-level directories
Calls: ... eval -> eval -> -> serve -> setwd -> site_root
Execution halted

Exited with status 1.

And I have no idea what it's referring to. Anyone have any experience with this?