diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 17f698b2b..4656c8196 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.30.0",
+    "version": "2.30.1",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/error.ts b/packages/hydrooj/src/error.ts
index c5ea707b9..9fefbcb1a 100644
--- a/packages/hydrooj/src/error.ts
+++ b/packages/hydrooj/src/error.ts
@@ -1,18 +1,11 @@
 /* eslint-disable max-len */
 /* eslint-disable func-names */
-import { isClass } from './utils';
 
 interface IHydroError {
     new(...args: any[]): HydroError
 }
 
-function isHydroError(item: any): item is IHydroError {
-    return isClass(item);
-}
-
-const Err = (name: string, ...info: Array<IHydroError | (() => string) | ((_super: Function, ...args: any) => HydroError) | string | number>) => {
-    let Class: IHydroError;
-    let constr: (_super: Function, ...args: any[]) => HydroError;
+const Err = (name: string, Class: IHydroError, ...info: Array<(() => string) | string | number>) => {
     let msg: () => string;
     let code: number;
     for (const item of info) {
@@ -20,26 +13,14 @@ const Err = (name: string, ...info: Array<IHydroError | (() => string) | ((_supe
             code = item;
         } else if (typeof item === 'string') {
             msg = function () { return item; };
-        } else if (isHydroError(item)) {
-            Class = item;
-        } else if (typeof item === 'function' && item.length === 0) {
-            // @ts-ignore
-            msg = item;
         } else if (typeof item === 'function') {
-            // @ts-ignore
-            constr = item;
+            msg = item;
         }
     }
     const HydroError = class extends Class { };
     HydroError.prototype.name = name;
     if (msg) HydroError.prototype.msg = msg;
     if (code) HydroError.prototype.code = code;
-    if (constr) {
-        const original = HydroError.prototype.constructor;
-        HydroError.prototype.constructor = function (...args: any[]) {
-            constr.call(this, original.bind(this, ...args));
-        };
-    }
     return HydroError;
 };
 
@@ -49,7 +30,7 @@ export class HydroError extends Error {
 
     constructor(...params: any[]) {
         super();
-        this.params = params;
+        this.params = params || [];
     }
 
     // eslint-disable-next-line class-methods-use-this
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index ce4dcb688..c0b3ae472 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -311,12 +311,13 @@ export class HandlerCommon {
     }
 
     checkPerm(...args: bigint[]) {
-        // @ts-ignore
-        if (!this.user.hasPerm(...args)) throw new PermissionError(...args);
+        if (!this.user.hasPerm(...args)) {
+            if (this.user.hasPriv(PRIV.PRIV_USER_PROFILE)) throw new PermissionError(...args);
+            throw new PrivilegeError(PRIV.PRIV_USER_PROFILE);
+        }
     }
 
     checkPriv(...args: number[]) {
-        // @ts-ignore
         if (!this.user.hasPriv(...args)) throw new PrivilegeError(...args);
     }
 
diff --git a/packages/hydrooj/src/ui.ts b/packages/hydrooj/src/ui.ts
index 4dd5c2612..b294ea07a 100644
--- a/packages/hydrooj/src/ui.ts
+++ b/packages/hydrooj/src/ui.ts
@@ -42,7 +42,7 @@ if (cluster.isMaster) {
     });
     if (process.env.NODE_ENV !== 'test') {
         process.stdin.setEncoding('utf-8');
-        process.stdin.setRawMode(false);
+        if (process.stdin.setRawMode) process.stdin.setRawMode(false);
         process.stdin.on('data', (buf) => {
             const input = buf.toString();
             if (input[0] === '@') {