Not able to see BEGIN exam option for upcoming exam| AWS cloud practitioner certification exam

Hi Amazon Team,

I am facing the issue regarding my upcoming AWS certification exam of AWS Cloud Practitioner through PeasonVue(OnVue) and I cannot find the BEGIN button to start the exam. I still see the "cancel/reschedule" option but not the BEGIN option. I tried refreshing as well as logging in and logging out the account also, but still no luck.

Can you please help me as I have to appear for this exam in few hours. And how am I supposed to begin my exam if I don't see the option to start it.

Please let me know if the details of the exam which I scheduled are required as I don't want to miss out. Kindly look into it asap.