It is advisable for you to cross-check all the details you have put in the form to make sure you are not leaving any box blank. There might be something you must have missed to fill out.
If you are still facing issues, you can also try to open the link in incognito mode and try to submit it from there.
If the problem still persists, you should contact the IIBM assistance centre to get you helo through the submission.
You can also fill the Common Application Form on our website for admission-related assistance. You can also reach us through our IVRS Number - 1800-572-9877.