Anaconda opens Navigator to report an error and a web page appears Navigator Error An unexpected error occurred on Navigator start-up Report

Anaconda Navigator opens the following web page:

solution:
1. Run with the administrator: Anaconda Prompt
2. Conda update anaconda-navigator
this command may cause the following error:
InvalidTypeError: Parameter _channels = ‘- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/ – https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda/ declared in C: \ Users \ 12270 condarc has type STR.
Valid types:- tuple

Solution: Find the.condarc file under C:\Users\username folder and change it to the following:

channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/win-64
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/noarch
show_channel_urls: true

3. Conda update anaconda-navigator