Attempted to install pyjwt with Anaconda and received this error:

ERROR conda.core.link:_execute_actions(337): An error occurred while installing
package 'conda-forge::pyjwt-1.5.3-py_0'.
CondaError: Cannot link a source that does not exist. C:\Users\tsnell\AppData\Lo
cal\Continuum\Anaconda2\Scripts\conda.exe
Attempting to roll back.

CondaError: Cannot link a source that does not exist. C:\Users\tsnell\AppData\Lo
cal\Continuum\Anaconda2\Scripts\conda.exe

Current conda Install:

           platform : win-64
      conda version : 4.3.27
   conda is private : False
  conda-env version : 4.3.27
conda-build version : not installed
     python version : 2.7.13.final.0
   requests version : 2.14.2
   root environment : C:\Users\tsnell\AppData\Local\Continuum\Anaconda2  (writable)
default environment : C:\Users\tsnell\AppData\Local\Continuum\Anaconda2
   envs directories : C:\Users\tsnell\AppData\Local\Continuum\Anaconda2\envs
                      C:\Users\tsnell\AppData\Local\conda\conda\envs
                      C:\Users\tsnell\.conda\envs
      package cache : C:\Users\tsnell\AppData\Local\Continuum\Anaconda2\pkgs
                      C:\Users\tsnell\AppData\Local\conda\conda\pkgs
       channel URLs : https://repo.continuum.io/pkgs/main/win-64
                      https://repo.continuum.io/pkgs/main/noarch
                      https://repo.continuum.io/pkgs/free/win-64
                      https://repo.continuum.io/pkgs/free/noarch
                      https://repo.continuum.io/pkgs/r/win-64
                      https://repo.continuum.io/pkgs/r/noarch
                      https://repo.continuum.io/pkgs/pro/win-64
                      https://repo.continuum.io/pkgs/pro/noarch
                      https://repo.continuum.io/pkgs/msys2/win-64
                      https://repo.continuum.io/pkgs/msys2/noarch
        config file : C:\Users\tsnell\.condarc
         netrc file : None
       offline mode : False
         user-agent : conda/4.3.27 requests/2.14.2 CPython/2.7.13 Windows/7 Windows/6.1.7601    
      administrator : False

As a work-around, I installed the 1.5.2 version for windows (win-64/pyjwt-1.5.2.py36_1.tar.bz2) and that installed fine.