keyshot studio gpu mode error:7900

when i use Gpu mode in my project ,the software report error as the image tells,can anyone helps me with it?Thanks a lot!!!
Optix error:7900(CUDA error)
Device:Nvidia Geforce Rtx 4070 super
Cuda error:cudaErrorDevicesUnavailable(Cuda-capable device(s) is/are busy or unavailable)
Device:Nvidia Geforce Rtx 4070 super
Failed initializing Optix drvier
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