From e497d94ecece5b60bd882cc76e952bceed41d718 Mon Sep 17 00:00:00 2001
From: Douglas Gubert <douglas.gubert@gmail.com>
Date: Wed, 27 Aug 2025 10:33:53 -0300
Subject: [PATCH] fix: prevent unhandled promise rejection if app has compiler
 error on startup (#36802)

---
 .changeset/polite-students-lick.md            | 6 ++++++
 packages/apps-engine/src/server/AppManager.ts | 4 ++++
 2 files changed, 10 insertions(+)
 create mode 100644 .changeset/polite-students-lick.md

diff --git a/.changeset/polite-students-lick.md b/.changeset/polite-students-lick.md
new file mode 100644
index 00000000000..85dfdcf0cb7
--- /dev/null
+++ b/.changeset/polite-students-lick.md
@@ -0,0 +1,6 @@
+---
+'@rocket.chat/apps-engine': patch
+'@rocket.chat/meteor': patch
+---
+
+Fixes an error on apps loading that would cause an unhandled promise rejection crash during startup in some cases
diff --git a/packages/apps-engine/src/server/AppManager.ts b/packages/apps-engine/src/server/AppManager.ts
index ffedf97e2f2..745aabc6105 100644
--- a/packages/apps-engine/src/server/AppManager.ts
+++ b/packages/apps-engine/src/server/AppManager.ts
@@ -281,6 +281,10 @@ export class AppManager {
 					getStatus() {
 						return Promise.resolve(AppStatus.COMPILER_ERROR_DISABLED);
 					},
+
+					on(): void {
+						return undefined;
+					},
 				} as unknown as DenoRuntimeSubprocessController);
 
 				this.apps.set(item.id, prl);