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 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 here.
You can learn more about installing, unintalling, and repairing graphics drivers here.