Cannot click "Submit application" button in "MyImperial" postgraduate portal

Hi everyone, I'm currently applying for the MSc program at Imperial. I'm having a bit of trouble with the final step of my application submission, where I can't seem to click the "Submit Application" button within my Imperial portal account.

Surprisingly, after completing the application fee, I received an email notifying me that my application had been successfully completed. Even in MyImperial, the application status indicates "Application submitted".

However, the request status of my references still shows as "not submitted" instead of "Sent", even though I received the confirmation email. My referees also haven't received the reference email yet.

Does this mean my application is not fully complete? If so, how can I complete it and make the system send the request to my referees for their submissions? I'm curious if anyone else is experiencing a similar issue.