RuntimeError: DataLoader worker (pid(s) 48916, 48917) exited unexpectedly

I have encountered the error when I try to run the tutorial with tensorboard. Initially, it told me that tensorboard was not found and I installed tensorboard along with TensorFlow. Even though I had not encountered an issue, now I have a runtime error and couldn’t derive a solution to this problem, I’ve created a file in GitHub and you can reach the file from this link