Google Slides Black Screen

Google Slides Black Screen

We have just setup a Player (Pi 4 1gb) at a new site. It consists of the following:

  1. Clock Widget
  2. Twitter Widget
  3. Google Slides Widget
  4. Text Ticker
After a few hours the Google Slides widget will go black, the only way to fix is with a restart. I have also set a fallback image which does not appear either.

What could be causing the black screen? and the fallback image not working? Would I need to open ports to make playback more reliable? Would re-imaging the SD Card help?

All solutions / suggestions and ideas welcome :)

What it should be like:

90% of the time I get the following Screens: