TypeError: 'NoneType' object is not iterable

[DocJellyBean]

So I downloaded the portable and extracted it to G:_Program Files\ComfyUI. I then edited the extra_model_paths.example.yaml and entered this:
_base_path: G:_Program Files\ComfyUI_
and renamed the file to extra_model_paths.yaml

Now when I double-click run_nvidia_gpu.bat, I get the following:

G:_Program Files\ComfyUI>.\python_embeded\python.exe -s ComfyUI\main.py --windows-standalone-build
Traceback (most recent call last):
File "G:_Program Files\ComfyUI\ComfyUI\main.py", line 103, in
apply_custom_paths()
~~~~~~~~~~~~~~~~~~^^
File "G:_Program Files\ComfyUI\ComfyUI\main.py", line 29, in apply_custom_paths
utils.extra_config.load_extra_path_config(extra_model_paths_config_path)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "G:_Program Files\ComfyUI\ComfyUI\utils\extra_config.py", line 10, in load_extra_path_config
for c in config:
^^^^^^
TypeError: 'NoneType' object is not iterable

If I run the bat as an admin, I get

C:\Windows\System32>.\python_embeded\python.exe -s ComfyUI\main.py --windows-standalone-build
The system cannot find the path specified.

Am I going wrong somewhere?