diff --git a/server/eslint.config.js b/server/eslint.config.js
index c854029a0..4e45d6157 100755
--- a/server/eslint.config.js
+++ b/server/eslint.config.js
@@ -37,6 +37,7 @@ export default [
 			},
 		},
 		rules: {
+			"@typescript-eslint/no-unused-vars": ["error", { argsIgnorePattern: "^_" }], // Ignore unused variables that start with '_'
 			"@typescript-eslint/no-explicit-any": "warn", // Warn on 'any' types
 			"mocha/max-top-level-suites": "warn", // Warn if there are too many top-level suites instead of failing
 		},
diff --git a/server/src/db/models/MaintenanceWindow.ts b/server/src/db/models/MaintenanceWindow.ts
index ff309a117..311cf97bf 100644
--- a/server/src/db/models/MaintenanceWindow.ts
+++ b/server/src/db/models/MaintenanceWindow.ts
@@ -1,5 +1,5 @@
 import { Schema, model, type Types } from "mongoose";
-import type { MaintenanceWindow, DurationUnit } from "@/types/maintenanceWindow.js";
+import type { MaintenanceWindow } from "@/types/maintenanceWindow.js";
 
 type MaintenanceWindowDocumentBase = Omit<MaintenanceWindow, "id" | "monitorId" | "teamId" | "start" | "end" | "createdAt" | "updatedAt"> & {
 	monitorId: Types.ObjectId;
diff --git a/server/src/middleware/handleErrors.ts b/server/src/middleware/handleErrors.ts
index 1fffc9a8c..be9d9ea1e 100755
--- a/server/src/middleware/handleErrors.ts
+++ b/server/src/middleware/handleErrors.ts
@@ -1,15 +1,18 @@
 import type { NextFunction, Request, Response } from "express";
 import { logger } from "@/utils/logger.js";
+import { AppError } from "@/utils/AppError.js";
 
-const handleErrors = (error: any, req: Request, res: Response, next: NextFunction) => {
-	const status = error.status || 500;
-	const message = error.message || "Server error";
-	const service = error.service || "unknownService";
+const handleErrors = (error: unknown, req: Request, res: Response, _next: NextFunction) => {
+	const status = error instanceof AppError ? error.status || 500 : 500;
+	const message = error instanceof AppError ? error.message : "Server error";
+	const service = error instanceof AppError ? error.service : "unknownService";
+	const method = error instanceof AppError ? error.method : "unknownMethod";
 	logger.error({
 		message: message,
 		service: service,
-		method: error.method,
-		stack: error.stack,
+		method: method,
+		stack: error instanceof AppError ? error.stack : undefined,
+		details: error instanceof AppError ? error.details : undefined,
 	});
 	res.status(status).json({
 		status,
diff --git a/server/src/service/infrastructure/statusService.ts b/server/src/service/infrastructure/statusService.ts
index badcf78ec..ef725b80a 100755
--- a/server/src/service/infrastructure/statusService.ts
+++ b/server/src/service/infrastructure/statusService.ts
@@ -360,8 +360,7 @@ export class StatusService implements IStatusService {
 			};
 		} catch (error: unknown) {
 			throw new AppError({
-				message: `Failed to update monitor status: ${error instanceof Error ? error.message : "Unknown error"}`,
-				details: `Error updating status for monitor with id ${check.metadata.monitorId}`,
+				message: `Failed to update monitor with id ${check.metadata.monitorId} with status: ${error instanceof Error ? error.message : "Unknown error"}`,
 				service: SERVICE_NAME,
 				method: "updateMonitorStatus",
 			});
diff --git a/server/src/utils/AppError.ts b/server/src/utils/AppError.ts
index c19f726f2..4c8887a9c 100644
--- a/server/src/utils/AppError.ts
+++ b/server/src/utils/AppError.ts
@@ -1,18 +1,18 @@
 export interface AppErrorConfig {
-	message: string;
+	message?: string;
 	status?: number;
-	service?: string | null;
-	method?: string | null;
-	details?: unknown;
+	service?: string;
+	method?: string;
+	details?: Record<string, unknown> | undefined;
 }
 
 export class AppError extends Error {
-	private status: number;
-	private service: string | null;
-	private method: string | null;
-	private details: unknown;
+	readonly status: number;
+	readonly service: string;
+	readonly method: string;
+	readonly details: Record<string, unknown> | undefined;
 
-	constructor({ message, status = 500, service = null, method = null, details = null }: AppErrorConfig) {
+	constructor({ message, status = 500, service = "unknownService", method = "unknownMethod", details = undefined }: AppErrorConfig) {
 		super(message);
 		this.status = status;
 		this.service = service;