Anaconda Navigator の　launch errorの原因

前提・実現したいこと

環境：windows10
Anaconda NavigatorからjupyterLabを起動すると、launch errorになり以下のようなエラーメッセージがAnaconda Navigatorから表示されます。
また、起動したjupyterLabではあらゆるコードがNo karnel!と表示され実行されなくなってしまいました。

エラーメッセージ

[I 19:57:53.643 LabApp] The port 8888 is already in use, trying another port.
[I 19:57:53.644 LabApp] The port 8889 is already in use, trying another port.
[I 19:57:53.646 LabApp] The port 8890 is already in use, trying another port.
[I 19:57:53.647 LabApp] The port 8891 is already in use, trying another port.
[I 19:57:53.648 LabApp] The port 8892 is already in use, trying another port.
[I 19:57:53.681 LabApp] JupyterLab extension loaded from C:\Users\c011924944\Anaconda3\lib\site-packages\jupyterlab
[I 19:57:53.682 LabApp] JupyterLab application directory is C:\Users\c011924944\Anaconda3\share\jupyter\lab
[W 19:57:53.715 LabApp] JupyterLab server extension not enabled, manually loading...
[I 19:57:53.720 LabApp] JupyterLab extension loaded from C:\Users\c011924944\Anaconda3\lib\site-packages\jupyterlab
[I 19:57:53.720 LabApp] JupyterLab application directory is C:\Users\c011924944\Anaconda3\share\jupyter\lab
[I 19:57:53.721 LabApp] Serving notebooks from local directory: C:\Users\c011924944
[I 19:57:53.721 LabApp] The Jupyter Notebook is running at:
[I 19:57:53.721 LabApp] http://localhost:8881/?token=7406f72bc27bd9cdb61c07a6eb50495b5798594f088b30e6
[I 19:57:53.721 LabApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 19:57:53.822 LabApp] 

To access the notebook, open this file in a browser:
file:///C:/Users/c011924944/AppData/Roaming/jupyter/runtime/nbserver-15728-open.html
Or copy and paste one of these URLs:
http://localhost:8881/?token=7406f72bc27bd9cdb61c07a6eb50495b5798594f088b30e6
[W 19:57:58.598 LabApp] Could not determine jupyterlab build status without nodejs
[I 19:58:02.446 LabApp] Kernel started: 4af9fc7e-78ee-4e38-8755-344f191de3b4
[I 19:58:02.486 LabApp] Kernel started: da384ece-76ca-4b91-8183-f811169b0352
Traceback (most recent call last):
File "C:\Users\c011924944\Anaconda3\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "C:\Users\c011924944\Anaconda3\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Users\c011924944\Anaconda3\lib\site-packages\ipykernel_launcher.py", line 1, in 
-f
NameError: name 'f' is not defined