2dnav_pr2 package install in command prompt windows 10

[IdaChenCCL]

I could not find the 2dnav_pr2 with rospack find and tried to install the package with choco install ros-melodic-2dnav-pr2. But it does not work.
The error message is shown below.

Chocolatey v0.10.15
2 validations performed. 1 success(es), 1 warning(s), and 0 error(s).

Validation Warnings:

• A pending system reboot request has been detected, however, this is
  being ignored due to the current Chocolatey configuration. If you
  want to halt when this occurs, then either set the global feature
  using:
  choco feature enable -name=exitOnRebootDetected
  or pass the option --exit-when-reboot-detected.

Installing the following packages:
ros-melodic-2dnav_pr2
By installing you accept licenses for the packages.
ros-melodic-2dnav_pr2 not installed. The package was not found with the source(s) listed.
Source(s): 'https://roswin.azurewebsites.net/api/v2;https://chocolatey.org/api/v2/'
NOTE: When you specify explicit sources, it overrides default sources.
If the package version is a prerelease and you didn't specify --pre,
the package may not be found.
Please see https://chocolatey.org/docs/troubleshooting for more
assistance.

Chocolatey installed 0/1 packages. 1 packages failed.
See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.log).

Failures

• ros-melodic-2dnav_pr2 - ros-melodic-2dnav_pr2 not installed. The package was not found with the source(s) listed.
  Source(s): 'https://roswin.azurewebsites.net/api/v2;https://chocolatey.org/api/v2/'
  NOTE: When you specify explicit sources, it overrides default sources.
  If the package version is a prerelease and you didn't specify --pre,
  the package may not be found.
  Please see https://chocolatey.org/docs/troubleshooting for more
  assistance.