Me and my friend is also facing this issue, we applied for MCA, and on site it was showing *admit card to be held on 10th oct* we didn't get out admit card it was showing *incorrect credentials* and today we came to know, exam has been conducted on 10th oct, 2021.

Hi, so basically if you are facing such problems regarding credentials then you can do alot of things.

First check if you have a registration id mentioned in your sms when registering for application in website.

If this doesn't work then try contacting the authorities. The details might be provided in the website itself.

Contact them and talk about your concern, they would definitely help you out.

Hope this is helpful