This can happen for a number of reasons. By examining the end of the URL on the error screen you can diagnose possible causes of the issue. See the following Q&A in this section for additional information.
Q. I receive an ERROR_CANDIDATE_NOT_FOUND error when connecting to my Open Group account at Pearson VUE. What should I do?
A. If you are registering for the first time, this indicates we were unable to transfer your details to Pearson VUE due to an issue with your profile. Please check you have a valid phone number and address including country. If after updating you still have errors please contact our helpdesk using the address given on the screen.
Q. I receive an ERROR_VUE_WIDE_BLOCK error when connecting to my Open Group account at Pearson VUE. What should I do?
A. Unfortunately this means that Pearson VUE has put a block on your account, this is usually done automatically by their system due to too many invalid payment attempts. To remove this block you will need to call Pearson VUE Customer Service and verify your details. They can be reached at http://pearsonvue.com/theopengroup/contact/ The block will then be removed and you can then proceed with booking the exam, or you can ask the agent if its possible to book the exam for you .