If you are given a notification that you cannot continue with a program, there are several typical reasons.
First, you are attempting to take the second section of a two-part exam. The first part of the exam must be graded before you will be able to continue. Per the syllabus, grading of the first section of an exam will take between three days to two weeks.
Second, you are attempting to move from one certification level to the next one (for instance, from L1 to L2). The typical reason for this is that your grade needs to be reviewed. You should expect an email clarifying your status in one to two days after completing the exam.