i installed bumblebee to switch between GPU but when i run the commande optirun i get the following message [ 97.796880] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) Failed to load module "nvidia" (module does not exist, 0)
[ 97.796906] [ERROR]Aborting because fallback start is disabled. i have installed the nvidia drivers, but the GPU declare itself as 3d controller not VGA compatible 06:00.0 3D controller: NVIDIA Corporation GP108M [GeForce MX250] (rev a1) 00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics G7 (rev 07)