Dash is experiencing compatibility issues that may be related to your graphics drivers.
Dash uses the Vulkan API. In order to successfully use Oculus Rift S or Rift's full features and functionality, your PC must have the latest Vulkan compatible graphics drivers installed.
To resolve this compatability issue, try the following:
Nvidia users on driver 411.63 with Intel integrated graphics should update their Intel graphics driver.
You can learn more about installing, unintalling, and repairing graphics drivers here.