Enrollment workflow failed: AlternativeBusinessContact is required on Individual account

Hello Microsoft Support Team,

I am attempting to register for a Microsoft Store Developer account as an Individual, but I am completely blocked during Step 4 (Account setup) with the error:

"Enrollment workflow failed: AlternativeBusinessContact is required"

• Account type: Individual
• Publisher Name: DSN Studio
• Email: ******@gmail.com (or ******@outlook.com)
• Country: Vietnam

All visible fields in the "Profile details" step have been filled out completely and verified with green checks. Because this is an Individual account, the "AlternativeBusinessContact" field is not exposed in the UI, making it impossible to satisfy.

Additionally, navigating to Developer Support via "Create support case (MSA)" hangs on the Engage Center (targetExperience/sfb) screen indefinitely.

Could a support engineer or moderator please help escalate my account to the engineering/operations team to manually clear this backend flag?

Thank you!