Navigator Error

[Mercier93]

Main error

Application notebook launch may have produced errors.

Traceback

[I 18:14:21.034 NotebookApp] The port 8888 is already in use, trying another port.
[I 18:14:21.085 NotebookApp] The port 8889 is already in use, trying another port.
[I 18:14:21.136 NotebookApp] The port 8890 is already in use, trying another port.
[I 18:14:21.421 NotebookApp] Serving notebooks from local directory: C:\Users\Mercier
[I 18:14:21.472 NotebookApp] 0 active kernels 
[I 18:14:21.522 NotebookApp] The Jupyter Notebook is running at: http://localhost:8891/?token=cc9b2a93204e9d256005a4242fe8b9d54ef2b3c5386dbc5b
[I 18:14:21.572 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 18:14:21.674 NotebookApp] 
    
    Copy/paste this URL into your browser when you connect for the first time,
    to login with a token:
        http://localhost:8891/?token=cc9b2a93204e9d256005a4242fe8b9d54ef2b3c5386dbc5b
[I 18:14:22.339 NotebookApp] Accepting one-time-token-authenticated connection from ::1
[I 18:14:22.340 NotebookApp] Refusing to serve hidden directory, via 404 Error
[W 18:14:22.369 NotebookApp] 404 GET /tree?token=daaef70a2f415600f20477241298036c7a4ca6e96a6c2b04 (::1) 31.00ms referer=None

System information

python: 3.6.1
language: en_US
os: Windows;7;6.1.7601;AMD64;Intel64 Family 6 Model 58 Stepping 9, GenuineIntel
version: 1.6.2
platform: win-64
qt: 5.6.2
pyqt: 5.6.0
conda: 4.3.21

[goanpeca]

See Issue jupyter/notebook#2382 for more information on how to fix this.

---

Please remember to update to the latest version of Navigator to include
the latest fixes.

Open a terminal (on Linux or Mac) or the Anaconda Command Prompt (on windows)
and type:

$ conda update anaconda-navigator

[Mercier93]

I'm still unable to solve this issue. I can't seem to figure out how to fix this problem.