Did you find out what caused this issue and how to correct it.

I'm getting the same message when trying to send my return via Netfile.....were you able to resolve?

@kokolily Please double check that your NETFILE Access Code (NAC) is correct and has all 8 characters. You can also try submitting your return without the NAC. The NAC is optional and not required to file your return.

Thank you.  I actually figured it out after posting my question!  Yes, that did resolve the issue (I was using the incorrect NAC - silly me)!

@kokolily Thanks for the update.