Thanks for the ping, @John6666!
Those errors are indeed not a problem. As the retry message indicates, the thread that received the error response will retry in some amount of time. If there is an error that prevents the upload (or download) from completing successfully, an error message and stack trace will be printed. If that is the case, let me know and I can debug further.
@VLM-Forgetting how often did this error appear and what version of hf-xet do you have installed in your Python environment (you can run hf env in the terminal to see this)?