title: Can't update python packages through anaconda navigator anaconda 2019.07
body: <p>I have installed Anaconda 2019.07, the latest release. I went to the navigator, and looked at packages that can be updated. for example it shows that pandas can be updated, but when I check it, it comes up with the window to show what packages will be updated, but it is empty and the apply button is grayed out. I randomly tried a different package, same issue.</p>
  
  <p>I tried going to the anaconda terminal and doing a conda update navigator, and it said there would be packages downgraded, I don't want that.</p>