Need help with rendering

Hello, I am new here. Trying my hand at designing interiors and stuff. Quite interesting it is. Since i am learning this software, i am stuck at something which i need help with. So, basically the scene i have created in sketchup was working all fine until yesterday. Renders were happening as they should. But i am not sure why am i not able to see anything in renders now. Either it’s completely black & white renders (not alpha) or the section cuts are visible in the render too. Attaching pictures for your reference below.
Kindly help me out with this. Thank you!

Reference pictures

Glad to see you learning V-Ray for Sketchup…/check out our course on SketchUp Campus called ‘V-Ray for Interiors’. Come back here if you have any specific questions after completing the lessons. Cheers.