NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running

I am working to setup Zorin OS 16 with Nvidia GeForce MX250 on my box.
When I run command #nvidia-smi it returns as below

$ nvidia-smi
NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

#Below output is for review and help.

$ prime-select nvidia
Info: the nvidia profile is already set

$ prime-select query
nvidia

$ dkms status
nvidia, 470.57.02, 5.11.0-25-generic, x86_64: installed
nvidia, 470.57.02, 5.11.0-27-generic, x86_64: installed

$ grep -r nvidia /etc/modprobe.d/* /lib/modprobe.d/*
/etc/modprobe.d/blacklist-framebuffer.conf:blacklist nvidiafb

$ uname -a
Linux abid-BOHB-WAX9 5.11.0-27-generic #29~20.04.1-Ubuntu SMP Wed Aug 11 15:58:17 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

$ lspci | grep -i nvidia
06:00.0 3D controller: NVIDIA Corporation GP108M [GeForce MX250] (rev a1)