Course code is not working for certification test

I tried taking certification test for Online training on IoT and ML, it is showing that entry did not match but I had entered the correct email Id and course code. Please look into the issue.
Mail Id :

Hi @shivaprasadnaikawadi,
I have taken this to the team and we’ll fix the issue as soon as possible.

Hi @raghav.srivastava,
Can you please update me on this.

Hi @shivaprasadnaikawadi,
I am waiting for a response from the team. I’ll let you know as soon as I get any updates.