I finished Microsoft Ignite Dynamics 365 Fundamentals Challenge before Oct 7, 2020, more precisely 26.09.2020. But I didn't receive any email info, and when I go to the Exam Discounts and insert my email I get a message: No exam code is specified within the current user context. Please select an exam from.
The Microsoft Ignite Cloud Skills Challenge will only provide you with 1 voucherless exam coupon through email used when registering with Microsoft Ignite hence no voucher code will be issued.
If you can't claim your voucherless exam coupon, you can check your email from Microsoft Ignite for any notification regarding the exam voucher and reenter your email again in the Microsoft certification website.
You can also try to clear your cache and cookies on your browser and use incognito / in private browser to check your email address on the portal.