Training "killed" error

Just getting started with getting DLC up and running in our lab and having some trouble. We’re running on an ubuntu VM with the DLC-CPU environment. Every time we run training, it launches the threads and shortly after it crashes, with the only error message being “killed.” This happens when we run through the GUI and also through the command line. When we ran the Openfield notebook example, it died on the training step with Kernel Restarting error. Any tips would be greatly appreciated!