Long time audio converter customer and newbie video converter trial customer (Thinking of purchasing). I can convert using non Nvidia but want to use my internal Nvidia card and keep getting the error below. Any help would be appreciated. I have the 391.35 Nvidia drivers currently installed. Thank you!

Error converting to MP4 (Nvidia HVEC H265), 'D:\!!!!!!!!!! Download\ESPN Films - 30 for 30 - 42 to 1.mkv' to 'D:\!!!!!!!!!! Download\ESPN Films - 30 for 30 - 42 to 1.mp4'
[hevc_nvenc @ 0000028bc95e3180] Cannot load nvEncodeAPI64.dll
[hevc_nvenc @ 0000028bc95e3180] The minimum required Nvidia driver for nvenc is 378.66 or newer
Error initializing output stream 0:0 -- Error while opening encoder for output stream *0:0 - maybe incorrect parameters such as bit_rate, rate, width or height