It only shows a black/blank window after you open a web browser on the remote computer during a remote session.
Please first make sure you're running Splashtop Streamer v188.8.131.52 or later.
- Open the streamer UI
- Go to the Advanced tab, scroll down to find the Install Mirror Driver button
- Click the button to install
- Known affected browsers are: Google Chrome, Internet Explorer, Microsoft Edge
- There are two limitations when using Mirror driver. Please click into the link for more details.