Try this workaround:
This error was called Error code 6 in the beta and now its NodeSpecCache not writing
If your Base system language is not English (USA) you can receive this problem. Changing the language will not help. At least in Eastern Europe not helping.
Solution to play at launch without shamanism with your PC:
Create new user for your PC with only english letters in its name. And play from it, till Bioware will resolve this (for all beta it was the problem and still its there even at launch).
p.s. Renaming current user won't help. Posted this just to help other people to save their time and nerves.