Anaconda Navigatorでmodule 'collections' has no attribute 'Mapping'と出る

anaconda navigatorを開く際、
AttributeError: module 'collections' has no attribute 'Mapping'
というエラーが発生しました。
解決方法を教えてください。

There is an instance of anaconda navigator already ruuning

module 'collections' has no attribute 'Mapping'
Traceback (most recent call last):
  File "C:\Users\ryotn\anaconda\Lib\site-packages\anaconda_navigator\exceptions.py", line 109, in exception_handler
    return_value = func(*args, **kwargs)
                   ^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ryotn\anaconda\Lib\site-packages\anaconda_navigator\app\start.py", line 140, in start_app
    window = run_app(splash)
             ^^^^^^^^^^^^^^^
  File "C:\Users\ryotn\anaconda\Lib\site-packages\anaconda_navigator\app\start.py", line 62, in run_app
    window = MainWindow(splash=splash)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ryotn\anaconda\Lib\site-packages\anaconda_navigator\widgets\main_window\__init__.py", line 215, in __init__
    anaconda_solvers.POOL.solve()
  File "C:\Users\ryotn\anaconda\Lib\site-packages\anaconda_navigator\utils\anaconda_solvers\core.py", line 57, in solve
    configuration = binstar_client.utils.get_config()
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ryotn\anaconda\Lib\site-packages\binstar_client\utils\config.py", line 252, in get_config
    recursive_update(config, file_configs[fn])
  File "C:\Users\ryotn\anaconda\Lib\site-packages\binstar_client\utils\config.py", line 93, in recursive_update
    if isinstance(updated_value, collections.Mapping):
                                 ^^^^^^^^^^^^^^^^^^^
AttributeError: module 'collections' has no attribute 'Mapping'
QWindowsWindow::setGeometry: Unable to set geometry 600x668+1552+112 (frame: 600x668+1552+112) on QWidgetWindow/"MessageBoxErrorClassWindow" on "\\.\DISPLAY2". Resulting geometry: 1200x1782+3104+224 (frame: 1200x1782+3104+224) margins: 0, 0, 0, 0 minimum size: 600x668 maximum size: 600x16777215 MINMAXINFO maxSize=0,0 maxpos=0,0 mintrack=600,668 maxtrack=600,0)
QWindowsWindow::setGeometry: Unable to set geometry 1200x3564+998+494 (frame: 1200x3564+998+494) on QWidgetWindow/"MessageBoxErrorClassWindow" on "\\.\DISPLAY1". Resulting geometry: 600x5346+998+494 (frame: 600x5346+998+494) margins: 0, 0, 0, 0 minimum size: 600x668 maximum size: 600x16777215 MINMAXINFO maxSize=0,0 maxpos=0,0 mintrack=1200,1336 maxtrack=1200,0)
QWindowsWindow::setGeometry: Unable to set geometry 600x2673+1563+254 (frame: 600x2673+1563+254) on QWidgetWindow/"MessageBoxErrorClassWindow" on "\\.\DISPLAY2". Resulting geometry: 1200x1782+1563+254 (frame: 1200x1782+1563+254) margins: 0, 0, 0, 0 minimum size: 600x668 maximum size: 600x16777215 MINMAXINFO maxSize=0,0 maxpos=0,0 mintrack=600,668 maxtrack=600,0)

There is an instance of anaconda navigator already ruuning