There are two parts to a transcode, decoding the video from the current format, and encoding it into the desired format.
As the 1030 does not support NVENC, it cannot be used for the encode portion of a transcode.
Suggest you look at a 1050 or better (i.e. a card with both NVENC & NVDEC).
Also, as shown in the Nvidia support matrix, GTX cards are limited to two concurrent transcodes (actually, two concurrent encodes and two concurrent decodes). A Quadro P2000 or better has no such limits.
You’ll also need to run PMS v1.17.0.1709, as it supports hardware decoding on systems with Nvidia GPUs.