First error you should read rainisto's advice: device lock can only be reset by full reflash (i.e. incl. eMMC). But due to the second error I am concerned your HW revision is not (anymore) included in PR1.3. Which Whic, btw, I think is the worst method to get an early development device to life again, please try with the earliest firmware of N950 you are able to find (afaik publicly PR1.1).