Root Causes (based on Microsoft’s explanation)
Microsoft moderators explained that 50001 commonly appears because:
1. Your phone number may already be tied to another Developer Program account
Microsoft enforces verification limits on a phone number.
2. The Developer Program signup service is experiencing an internal error
GitHub issue #222 shows users getting Code 50001: internal server error during signup.
Microsoft acknowledged this and asked affected users to contact internal support.
1) Try a different phone number.
2) Remove or reset any old developer program profile tied to your number.
3) Try via https://make.preview.powerapps.com.
4) If still failing → email kalyaniverma@microsoft.com (official escalation contact).
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