Thanks. I already have a code-level support request open for this: Case-ID 22506476 (contact: John), plus Feedback Assistant FB24912726. I posted here because I haven't had a reply on the case since October 19. The key finding is that the identical Hello World app installs when signed by a free team but fails with 0xe8008018 when signed by my paid team, which was upgraded from a free account on September 21, 2026. Could you look up the case or pass this thread to John?