When using the Preview pane within FYI, the preview of the file does not load and instead shows the following error with the option to download the file:
"Hmm... looks like this file doesn't have a preview we can show you"
This occurs when there is a disconnection of SharePoint and re-authentication of SharePoint is required.
- Sign into SharePoint as prompted in the Preview pane.
- Then refresh the screen and the Preview pane will display.