In Weebly, I am unable to upload PDF image or replace photos

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In Weebly tool, I want to add a PDF image to a page.  From the tool bar in the Media section, I drag PDF Document to the page.  It adds a section on the page and says to Click here to add PDF.  I click and PDF dialog box comes up.  I click Upload File and nothing happens.

Also, I want to add a photo image.  I drag the POWR File Embed app from tool bar in Installed Apps section to the page.  A dialog box titled POWR Editor comes up but is blank.

On an existing photo image, I click the box to bring up the Image dialog.  I select Replace Image and get box to select images.  I choose My Computer and select Upload a Photo From Your Computer.  Nothing happens.