fix: prevent unhandled promise rejection if app has compiler error on startup (#36802)

.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

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);