目的：啟動Anaconda Navigator，想要建立不同的虛擬環境

目前已經重複安裝多次Anaconda還是一樣
之前安裝時沒勾選環境變數：失敗
最後一次安裝有勾選加環境變數：也失敗

嘗試搜尋網路都是更新版本，所以也試著更新conda，指令如下
仍啟動失敗

$ conda update conda
$ conda update anaconda-navigator
$ conda update navigator-updater

$ anaconda-navigator --reset

==環境==
win 10
有安裝python 3.6
有安裝vs code
Anaconda
一開始安裝Anaconda3-5.0.1-Windows-x86_64
目前改安裝Anaconda3-5.2.0-Windows-x86_64

==錯誤訊息==
Navigator Error
An unexpected error occurred on Navigator start-up

Report
Please report this issue in the anaconda issue tracker

Main Error
expected str, bytes or os.PathLike object, not NoneType

Traceback

Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\exceptions.py", line 75, in exception_handler
return_value = func(*args, **kwargs)
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\app\start.py", line 150, in start_app
window = run_app(splash)
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\app\start.py", line 65, in run_app
window = MainWindow(splash=splash, tab_project=False)
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\widgets\main_window.py", line 168, in init
self.api = AnacondaAPI()
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\api\anaconda_api.py", line 2294, in AnacondaAPI
ANACONDA_API = _AnacondaAPI()
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\api\anaconda_api.py", line 91, in init
self._conda_api = CondaAPI()
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\api\conda_api.py", line 1767, in CondaAPI
CONDA_API = _CondaAPI()
File "C:\ProgramData\Anaconda3\lib\site-packages\anaconda_navigator\api\conda_api.py", line 353, in init
self.sys_rc_path = join(self.ROOT_PREFIX, '.condarc')
File "C:\ProgramData\Anaconda3\lib\ntpath.py", line 76, in join
path = os.fspath(path)
TypeError: expected str, bytes or os.PathLike object, not NoneType