diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index eed210519..4361d9914 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "5.0.0-beta.4",
+    "version": "5.0.0-beta.5",
     "bin": "bin/hydrooj.js",
     "main": "src/plugin-api",
     "module": "src/plugin-api",
diff --git a/packages/hydrooj/src/entry/worker.ts b/packages/hydrooj/src/entry/worker.ts
index a041a57b8..da48331e6 100644
--- a/packages/hydrooj/src/entry/worker.ts
+++ b/packages/hydrooj/src/entry/worker.ts
@@ -70,10 +70,12 @@ export async function apply(ctx: Context) {
     if (process.env.NODE_APP_INSTANCE === '0') {
         const staticDir = path.join(os.homedir(), '.hydro/static');
         await fs.emptyDir(staticDir);
-        await Promise.all(Object.values(global.addons).map(async (f) => {
+        // Use ordered copy to allow resource override
+        for (const f of Object.values(global.addons)) {
             const dir = path.join(f, 'public');
+            // eslint-disable-next-line no-await-in-loop
             if (await fs.pathExists(dir)) await fs.copy(dir, staticDir);
-        }));
+        }
         await new Promise((resolve, reject) => {
             ctx.inject(['migration'], async (c) => {
                 c.migration.registerChannel('hydrooj', require('../upgrade').coreScripts);
diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index 961a68d28..e7afaa1b4 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -211,7 +211,7 @@ export class ContestProblemListHandler extends ContestDetailBaseHandler {
         if (contest.isDone(this.tdoc) && canViewRecord) {
             const correction = await problem.getListStatus(domainId, this.user._id, this.tdoc.pids);
             for (const pid in correction) {
-                if (this.tsdoc.detail[pid]?.rid === correction[pid].rid) delete correction[pid];
+                if (this.tsdoc.detail?.[pid]?.rid === correction[pid].rid) delete correction[pid];
             }
             rids.push(...Object.values(correction).map((i) => i.rid));
             this.response.body.correction = correction;
diff --git a/packages/hydrooj/src/handler/misc.ts b/packages/hydrooj/src/handler/misc.ts
index 13a4b4987..14899654e 100644
--- a/packages/hydrooj/src/handler/misc.ts
+++ b/packages/hydrooj/src/handler/misc.ts
@@ -43,12 +43,11 @@ export class FilesHandler extends Handler {
         }
     }
 
-    @param('uid', Types.Int, true)
-    async get({ }, uid: number) {
+    async get({ }) {
         if (!this.udoc._files?.length) this.checkPriv(PRIV.PRIV_CREATE_FILE);
         this.response.body = {
             files: sortFiles(this.udoc._files),
-            urlForFile: (filename: string) => this.url('fs_download', { uid, filename }),
+            urlForFile: (filename: string) => this.url('fs_download', { uid: this.udoc._id, filename }),
         };
         this.response.pjax = 'partials/files.html';
         this.response.template = 'home_files.html';
diff --git a/packages/ui-default/index.ts b/packages/ui-default/index.ts
index 163e151bb..e22b4d2b3 100644
--- a/packages/ui-default/index.ts
+++ b/packages/ui-default/index.ts
@@ -181,6 +181,7 @@ export function apply(ctx: Context) {
         preload: Schema.string().default(''),
         domainNavigation: Schema.boolean().default(true).description('Show Domain Navigation'),
         about: Schema.string().role('markdown').default(defaultAbout),
+        enableScratchpad: Schema.boolean().default(true).description('Enable Scratchpad Mode'),
       }),
     }));
     ctx.Route('config_schema', '/manage/config/schema.json', SystemConfigSchemaHandler, PRIV.PRIV_EDIT_SYSTEM);
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index f36816121..52868b0f1 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.58.0-beta.4",
+  "version": "4.58.0-beta.5",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "index.ts",