MVA learning is supported on their own forums. I'd try asking for help in dedicated forums here.
--please don't forget to Accept as answer if the reply is helpful--
I attended Webnair on for Azure fundamentals on sep 10 and sep 11 using mi email address marianoseg1990@Karima ben .com.
I still cannot register for the free exam through de website. Important to mention that I am still using the same email address which is : marianoseg1990@Karima ben .com
I will attach confirmation,
Wait for your response,