Individual Store developer onboarding fails: PartnerIntegrationService call failed (timeout, then 400 INTERNAL_ERROR)

I'm registering as an Individual developer at storedeveloper.microsoft.com/onboarding. Identity verification is completed. On the final "Account setup" step:

First attempt: "Account creation failed. PartnerIntegrationService call failed: timeout of 30000ms exceeded"

Every retry since: "PartnerIntegrationService call failed: Request failed with status code 400" (code INTERNAL_ERROR)

Address validation and the publisher name check succeed ("Publisher name is available"); only the final account creation fails.

Correlation ID: 8faf80724660fec642db93f94d388f65 (23 October 2026, 01:08 and 01:11 CEST)

Partner Center only shows "My access", no Apps and games workspace. The "Get support" link opens Engage Center, which keeps loading after sign-in, so I can't open a support ticket there.

Possibly the first timed-out attempt partially created the account. Could someone check and complete or reset my registration?