This guide will let you know how to fix the GeForce Now Black screen error. Following are the two methods to resolve this issue.
Method 1
- The first thing you have to do is right-click on the taskbar and select the task manager.
 

- Then end all the Nvidia GeForce now tasks.
 

- After that, right-click on the GeForce now icon and then click “Open file location”.
 

- And then, you need to right-click on geforceNOWStreamer.json.
 

- Click “Open with”.
 

- Then click “More apps”.
 

- Now you will need to select Notepad.
 

- Tap on the OK button and then change dx11 to dx9 or dx12 in the Notepad file.
 

- Save the file
 

- And run the game, there will be no issue.
 

Method 2:
To fix the error with Method 2, you have to Reinstall GeForce Now.