Cannot access content library in Rise

Hello,

I've been trying to check out the long-awaited new feature of importing images from the content library, but it's not working as shown in the video. If I add a block with either a single image, and then try to edit the settings, the word that is there to click on says, "Change" instead of "Replace" like that shown in the Peek demonstration video. When I click on the "Change" link, my Windows dialog box opens for me to select an image on my PC. I don't get the option to "Replace from Content Library."

Likewise, when I add an image block with a gallery layout, instead of getting the "Replace" link, the only link I get is to "Remove" one of the images.  I am using the latest version of Chrome for editing in Rise. For the life of me I can't figure out what's going wrong.

Any help will be appreciated!

Marty Evans