My Mac is telling me PowerPoint or Keynote needs permissions to access a file

For security purposes, each Mac application runs inside of its “sandbox” to protect itself from potentially malicious applications. When you insert a LiveSlide into your presentation, the LiveSlides application needs to copy a placeholder image from its sandbox into your presentation software’s sandbox so it knows where to display the web content while you’re presenting.

If you see this prompt, click the “Select” button so the placeholder image can be inserted into your presentation.