Black Background Issue on Geant4 Interface Page

Hi there,
When I initially installed Geant4, the interface was working properly. However, after that, I have noticed a black background on the Geant interface page. When I run the simulation, I can see the particle tracks, but not the volumes and the boxes. Any assistance would be greatly appreciated.
Thanks in advance!

Hi Hasan

Please let us know your Geant4 version, your operating system (Linux/Windows/Mac) and platform (your actual computer). (I think this information is requested when you post a query.)

There are several things that could go wrong when it comes to graphics. Do you have the latest version of your graphics driver? Are you using X-windows remotely? Etc.

Get back to us and we might be able to help.

John