diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 6916e7da5..adab337b5 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.32.28",
+    "version": "2.32.29",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/judge.ts b/packages/hydrooj/src/handler/judge.ts
index b9d974acb..f4c374a13 100644
--- a/packages/hydrooj/src/handler/judge.ts
+++ b/packages/hydrooj/src/handler/judge.ts
@@ -11,11 +11,11 @@ import * as contest from '../model/contest';
 import domain from '../model/domain';
 import task from '../model/task';
 import * as system from '../model/system';
+import storage from '../model/storage';
 import * as bus from '../service/bus';
 import {
     Route, Handler, Connection, ConnectionHandler, post, Types,
 } from '../service/server';
-import storage from '../service/storage';
 import { updateJudge } from '../service/monitor';
 
 const logger = new Logger('judge');
@@ -81,6 +81,7 @@ export async function next(body: JudgeResultBody) {
 export async function end(body: JudgeResultBody) {
     if (body.rid) body.rid = new ObjectID(body.rid);
     let rdoc = await record.get(body.rid);
+    if (!rdoc) return;
     const $set: Partial<RecordDoc> = {};
     const $push: any = {};
     const $unset: any = { progress: '' };
diff --git a/packages/hydrooj/src/model/storage.ts b/packages/hydrooj/src/model/storage.ts
index 18610e973..154611aef 100644
--- a/packages/hydrooj/src/model/storage.ts
+++ b/packages/hydrooj/src/model/storage.ts
@@ -88,8 +88,7 @@ export class StorageModel {
             { path: target, autoDelete: { $exists: false } },
             { $set: { lastUsage: new Date() } },
         );
-        if (!res.value) return await storage.signDownloadLink(target, filename, noExpire, useAlternativeEndpointFor);
-        return await storage.signDownloadLink(res.value._id, filename, noExpire, useAlternativeEndpointFor);
+        return await storage.signDownloadLink(res.value?._id || target, filename, noExpire, useAlternativeEndpointFor);
     }
 }
 
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index 22b97c5cb..0492918c8 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -838,6 +838,7 @@ export function Connection(
     const sock = sockjs.createServer({ prefix, log });
     const checker = Checker(permPrivChecker);
     sock.on('connection', async (conn) => {
+        if (!conn) return;
         const h: Dictionary<any> = new RouteConnHandler(conn);
         try {
             const args = { domainId: 'system', ...h.request.params };
diff --git a/packages/utils/lib/utils.ts b/packages/utils/lib/utils.ts
index fc37a78cd..2ca233820 100644
--- a/packages/utils/lib/utils.ts
+++ b/packages/utils/lib/utils.ts
@@ -275,7 +275,7 @@ export namespace Time {
 export function errorMessage(err: Error | string) {
     const t = typeof err === 'string' ? err : err.stack;
     const parsed = t
-        .replace(/[A-Z]:\\.+\\@hydrooj\\/g, '\\')
+        .replace(/[A-Z]:\\.+\\@hydrooj\\/g, '@hydrooj\\')
         .replace(/\/.+\/@hydrooj\//g, '\\')
         .replace(/[A-Z]:\\.+\\hydrooj\\/g, 'hydrooj\\')
         .replace(/\/.+\/hydrooj\//g, 'hydrooj/')
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 06e4526d5..11c184958 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/utils",
-    "version": "1.1.2",
+    "version": "1.1.3",
     "description": "hydrooj utils",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro.git",