Rhino V-ray rendering not working (only black screen appears)

Rendering V-Ray
1

I was working on my rendering which was working well until when I opened another window and when I clicked the render button, only a black screen appears.

The V-ray progress windows says this:
*----------------------------------------
Preparing renderer…
Preparing scene for rendering…
[RenderView] startCameraTime=0.000000, endCameraTime=1.033333
[RenderView] numCameraTMs=62, numFrames=31, frameSamples=2
Initializing built-in VFB.
[RenderView] startCameraTime=0.000000, endCameraTime=1.033333
[RenderView] numCameraTMs=62, numFrames=31, frameSamples=2
Preparing camera sampler.
Preparing scene for frame…
Compiling geometry…
Preparing ray server.
Scene is empty.
Preparing direct light manager.
Preparing global light manager.
Irradiance sample size is 84 bytes
Photon size is 56 bytes.
Light cache sample size is 120 bytes.
1 interpolation maps registered
Rendering interpolation maps with minRate=-3 and maxRate=-2
Setting up 2 thread(s)
Threads completed
Setting up 2 thread(s)
Threads completed
Calling endPass() on irradiance maps
Calling prePassDone() on irradiance maps
Image prepass completed.
Rendering image.
Setting up 2 thread(s)
Threads completed
Number of raycasts: 549620
Camera rays: 549620
Shadow rays: 0
GI rays: 0
Reflection rays: 0
Refraction rays: 0
Unshaded rays: 0
Clearing global light manager.
Clearing direct light manager.
Clearing ray server.
Clearing geometry.
Number of intersectable primitives: 0
SD triangles: 0
MB triangles: 0
Static primitives: 0
Moving primitives: 0
Infinite primitives: 0
Clearing camera image sampler.
Clearing camera sampler.
Clearing DMC sampler.
Clearing path sampler.
Clearing color mapper.

Preparing renderer…
Preparing scene for rendering…
[RenderView] startCameraTime=0.000000, endCameraTime=1.033333
[RenderView] numCameraTMs=62, numFrames=31, frameSamples=2
Initializing built-in VFB.
[RenderView] startCameraTime=0.000000, endCameraTime=1.033333
[RenderView] numCameraTMs=62, numFrames=31, frameSamples=2
Preparing camera sampler.
Preparing scene for frame…
Compiling geometry…
Preparing ray server.
Scene is empty.
Preparing direct light manager.
Preparing global light manager.
Irradiance sample size is 84 bytes
Photon size is 56 bytes.
Light cache sample size is 120 bytes.
1 interpolation maps registered
Rendering interpolation maps with minRate=-3 and maxRate=-2
Setting up 2 thread(s)
Threads completed
Setting up 2 thread(s)
Threads completed
Calling endPass() on irradiance maps
Calling prePassDone() on irradiance maps
Image prepass completed.
Rendering image.
Setting up 2 thread(s)
Threads completed
Number of raycasts: 549620
Camera rays: 549620
Shadow rays: 0
GI rays: 0
Reflection rays: 0
Refraction rays: 0
Unshaded rays: 0
Clearing global light manager.
Clearing direct light manager.
Clearing ray server.
Clearing geometry.
Number of intersectable primitives: 0
SD triangles: 0
MB triangles: 0
Static primitives: 0
Moving primitives: 0
Infinite primitives: 0
Clearing camera image sampler.
Clearing camera sampler.
Clearing DMC sampler.
Clearing path sampler.
Clearing color mapper.*

Does anyone know the problem to this?

2

There’s a line there that says "Scene is empty"
Add a cube and a point light to see if V-Ray is working