Brand New Comfy UI install - AttributeError: 'IterableList' object has no attribute 'master

I just set up a brand new comfy ui portable and installed the ui manager with the batch file, it properly installed the manager but when I run update all I see this in the console...

```
FETCH DATA from: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json [DONE]
[ComfyUI-Manager] All startup tasks have been completed.
[ComfyUI-Manager] The ComfyRegistry cache update is still in progress, so an outdated cache is being used.
nightly_channel: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/cache
FETCH DATA from: E:\ComfyUI_windows_portable\ComfyUI\user\default\ComfyUI-Manager\cache\1514988643_custom-node-list.json [DONE]
[ComfyUI-Manager] The ComfyRegistry cache update is still in progress, so an outdated cache is being used.
nightly_channel: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/cache
FETCH DATA from: E:\ComfyUI_windows_portable\ComfyUI\user\default\ComfyUI-Manager\cache\1514988643_custom-node-list.json [DONE]
Traceback (most recent call last):
File "E:\ComfyUI_windows_portable\ComfyUI\custom_nodes\comfyui-manager\glob\manager_core.py", line 2373, in update_to_stable_comfyui
repo.git.checkout(repo.heads.master)
^^^^^^^^^^^^^^^^^
File "E:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\git\util.py", line 1200, in __getattr__
return list.__getattribute__(self, attr)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'IterableList' object has no attribute 'master'
ComfyUI update fail: The installed ComfyUI does not have a Git repository.
Updating: comfyui-manager
[ComfyUI-Manager] Queued works are completed.
{'update-comfyui': 1, 'update-main': 1}

After restarting ComfyUI, please refresh the browser.
```

I figured you would want to know..

comfy ui portable was installed by downloading the latest (i think 3.15) and I ran the nvidia gpu bat file to launch it, then I installed the manager an ran the update in the UI .. just wanted to share..