I have successfully completed the free training for the Certified in Cybersecurity (CC) certification. Currently, I am attempting to schedule my exam in Beijing, but I have encountered a persistent error over the past day. During the scheduling process, I was able to navigate to the step where exam centers are selected. However, after choosing a Beijing-based center and clicking "Next," a red error pop-up appears with no additional details or message. I have repeated the process multiple times, but the issue remains unresolved. Could you please assist in resolving this scheduling error?