# Motoko Build Failures in authorization/access-control.mo and user-approval/approval.mo – Persistent Compilation Errors Prevent Deployment **URL:** \ **Category:** Motoko\ **Created:** [November 25, 2025, 3:56am UTC](https://forum.dfinity.org/t/motoko-build-failures-in-authorization-access-control-mo-and-user-approval-approval-mo-persistent-compilation-errors-prevent-deployment/60418 "2025-11-25T03:56:55Z")\ **Posts on this page:** 1\ **Showing post:** 21
**Author:** ![TimeIsMoneyEntLLC](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/timeismoneyentllc/32/33166_2.png) [@TimeIsMoneyEntLLC](https://forum.dfinity.org/u/TimeIsMoneyEntLLC)\ **Post date:** [December 15, 2025, 4:41am UTC](https://forum.dfinity.org/t/motoko-build-failures-in-authorization-access-control-mo-and-user-approval-approval-mo-persistent-compilation-errors-prevent-deployment/60418/21 "2025-12-15T04:41:53Z")
> [@Motoko Build Failures – Follow‑Up Request for Engineering Assistance – Ticket #21158](https://forum.dfinity.org/t/motoko-build-failures-follow-up-request-for-engineering-assistance-ticket-21158/61229): > > Hi DFINITY and Caffeine Engineering Teams, I’m following up on my previous forum topic titled “Motoko Build Failures in authorization/access‑[control.mo](http://control.mo/) and user‑approval/approval.mo – Persistent Compilation Errors Prevent Deployment” and ticket #21158. Despite multiple rebuilds and environment resets, the same compilation issues persist across canister updates. Attached are seven screenshots showing the compiler responses and deployment error details captured during the latest attempts. Coul… --- _[View the full topic](https://forum.dfinity.org/t/motoko-build-failures-in-authorization-access-control-mo-and-user-approval-approval-mo-persistent-compilation-errors-prevent-deployment/60418)._