title: R Reticulate: 'Unable to locate conda environment' when attempting to use_condaenv(required = TRUE)
body: <p>I see variations of this question have been asked but none of the answers have resolved my problem. I'm using Windows 10, R version 3.6.2, RStudio version 1.2.5033, reticulate version 1.14</p>
  
  <pre><code>&gt; library(reticulate)
  &gt; library(dplyr)
  
  &gt; conda_list()
  </code></pre>
  
  <pre><code>          name                                                                        python
  1  r-miniconda                     C:\\Users\\caleb\\AppData\\Local\\r-miniconda\\python.exe
  2 r-reticulate C:\\Users\\caleb\\AppData\\Local\\r-miniconda\\envs\\r-reticulate\\python.exe
  </code></pre>
  
  <p>So I try to use the second item:</p>
  
  <pre><code>&gt; conda_list()[[2]][2] %&gt;%
  +   use_condaenv(required = TRUE)
  </code></pre>
  
  <p>But I get the following error:</p>
  
  <pre><code>Error in use_condaenv(., required = TRUE) : 
    Unable to locate conda environment 'C:/Users/caleb/AppData/Local/r-miniconda/envs/r-reticulate/python.exe'.
  </code></pre>
  
  <p>Looking for available versions gets me:</p>
  
  <pre><code>&gt; py_discover_config()
  python:         C:/Users/caleb/AppData/Local/r-miniconda/envs/r-reticulate/python.exe
  libpython:      C:/Users/caleb/AppData/Local/r-miniconda/envs/r-reticulate/python36.dll
  pythonhome:     C:/Users/caleb/AppData/Local/r-miniconda/envs/r-reticulate
  version:        3.6.10 |Anaconda, Inc.| (default, Jan  7 2020, 15:18:16) [MSC v.1916 64 bit (AMD64)]
  Architecture:   64bit
  numpy:          C:/Users/caleb/AppData/Local/r-miniconda/envs/r-reticulate/Lib/site-packages/numpy
  numpy_version:  1.18.1
  </code></pre>
  
  <p>This is my first attempt use Python from R so I'm confident this is a user-error issue but searching the error message and looking through related stack threads hasn't helped. Does anyone see what I'm doing wrong here?</p>