ERROR: NVIDIA driver is not loaded - Linux Mint 20 Ulyana

I have installed Linux Mint 20 Ulyana on my Mi Horizon 14 notebook equipped with Geforce MX350. After the installation I have enabled nvidia-driver-440 using Driver Manager. However, when I issue sudo nvidia-setttings in terminal I get the following error message.

ERROR: NVIDIA driver is not loaded
ERROR: Unable to load info from any available system.

(nvidia-settings:1702): GLib-GObject-CRITICAL **: 23:31:25.342: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
** Message: 23:31:25.343: PRIME: No offloading required. Abort
** Message: 23:31:25.343: PRIME: is it supported? no

Please note that I have enabled secure boot. I am attaching the output if it helps to resolve this issue.

nvidia-bug-report.log.gz (91.3 KB)