First of all, thanks so much for J.C's help! The suggestions are perfectly hitting home!
"Error binding socket......5131..." means port 5131 is being used by other applications at that time. Please ensure the port is available and do not run multiple OctaneServer programs at the same time. Besides, please make sure OctaneServer and the port are not blocked by the firewall.
About the GPU configuration and usage, as we don't have any additional settings about device configs on plugin side, running scene under Standalone might be the most useful way to locate issues. Thanks.
PS: I am not sure whether windows update can match the NV drivers perfectly. If it is possible, please fetch Nvidia drivers from the official website.
To use this version, you need a GPU of compute model 3.0 or higher. Support for Fermi GPUs (like GTX 4xx and 5xx) has been dropped. Also make sure you use a driver of version 387 or higher and if you are working on Mac OS that have a CUDA driver installed that supports at least CUDA 9.1.