Update (6 weeks in, still blocked): Since my original post, I've worked through multiple Developer Support advisors and completed every step they asked, but the enrollment still fails with the same error: "Your enrollment could not be completed at this time" (immediately at the identity step, before any payment, even in clean/incognito sessions). What's been tried, with no resolution: The original stuck enrollment was withdrawn by support. Updated my trusted phone number to my correct country code; confirmed account country/region and address match my invoice. Uploaded a government ID + proof of address via the official Send Files link (confirmed received). Support flagged a trusted device shared with a second personal Apple ID of mine (which has no developer enrollment). I separated the accounts: different trusted numbers/addresses, updated billing, removed the shared trusted devices. An advisor reset the relay and un-withdrew the enrollment, then asked me to retry — same error. After that, no response for over a week. Payment has been complete the whole time. It clearly needs an engineering-level fix to remove an account block that front-line steps can't clear. If anyone from Apple or anyone who solved a similar "trusted device shared across two Apple IDs" enrollment block could point me in the right direction, I'd really appreciate it.