diff --git a/backend/package.json b/backend/package.json
index a903b2d..0e7a08c 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.14.333",
+  "version": "2.14.334",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/core/proxy-utils/index.js b/backend/src/core/proxy-utils/index.js
index 099fcfc..91dc9f4 100644
--- a/backend/src/core/proxy-utils/index.js
+++ b/backend/src/core/proxy-utils/index.js
@@ -83,7 +83,7 @@ async function processFn(proxies, operators = [], targetPlatform, source) {
             const { mode, content } = item.args;
             if (mode === 'link') {
                 let noCache;
-                let url = content;
+                let url = content || '';
                 if (url.endsWith('#noCache')) {
                     url = url.replace(/#noCache$/, '');
                     noCache = true;
diff --git a/backend/src/restful/download.js b/backend/src/restful/download.js
index c567d65..a7bd067 100644
--- a/backend/src/restful/download.js
+++ b/backend/src/restful/download.js
@@ -123,10 +123,11 @@ async function downloadSubscription(req, res) {
                 ['localFirst', 'remoteFirst'].includes(sub.mergeSources)
             ) {
                 try {
-                    url = `${url || sub.url}`
-                        .split(/[\r\n]+/)
-                        .map((i) => i.trim())
-                        .filter((i) => i.length)?.[0];
+                    url =
+                        `${url || sub.url}`
+                            .split(/[\r\n]+/)
+                            .map((i) => i.trim())
+                            .filter((i) => i.length)?.[0] || '';
 
                     let $arguments = {};
                     const rawArgs = url.split('#');
@@ -283,10 +284,11 @@ async function downloadCollection(req, res) {
                     ['localFirst', 'remoteFirst'].includes(sub.mergeSources)
                 ) {
                     try {
-                        let url = `${sub.url}`
-                            .split(/[\r\n]+/)
-                            .map((i) => i.trim())
-                            .filter((i) => i.length)?.[0];
+                        let url =
+                            `${sub.url}`
+                                .split(/[\r\n]+/)
+                                .map((i) => i.trim())
+                                .filter((i) => i.length)?.[0] || '';
 
                         let $arguments = {};
                         const rawArgs = url.split('#');
diff --git a/backend/src/restful/subscriptions.js b/backend/src/restful/subscriptions.js
index 0324ee3..0b9fee1 100644
--- a/backend/src/restful/subscriptions.js
+++ b/backend/src/restful/subscriptions.js
@@ -68,10 +68,11 @@ async function getFlowInfo(req, res) {
         return;
     }
     try {
-        let url = `${sub.url}`
-            .split(/[\r\n]+/)
-            .map((i) => i.trim())
-            .filter((i) => i.length)?.[0];
+        let url =
+            `${sub.url}`
+                .split(/[\r\n]+/)
+                .map((i) => i.trim())
+                .filter((i) => i.length)?.[0] || '';
 
         let $arguments = {};
         const rawArgs = url.split('#');
diff --git a/backend/src/utils/download.js b/backend/src/utils/download.js
index 771ae0b..e4dfcf6 100644
--- a/backend/src/utils/download.js
+++ b/backend/src/utils/download.js
@@ -15,7 +15,7 @@ import $ from '@/core/app';
 const tasks = new Map();
 
 export default async function download(
-    rawUrl,
+    rawUrl = '',
     ua,
     timeout,
     proxy,
diff --git a/backend/src/utils/flow.js b/backend/src/utils/flow.js
index 18fb8d9..84d53ac 100644
--- a/backend/src/utils/flow.js
+++ b/backend/src/utils/flow.js
@@ -11,7 +11,7 @@ export function getFlowField(headers) {
     return headers[subkey];
 }
 export async function getFlowHeaders(rawUrl, ua, timeout, proxy, flowUrl) {
-    let url = flowUrl || rawUrl;
+    let url = flowUrl || rawUrl || '';
     let $arguments = {};
     const rawArgs = url.split('#');
     url = url.split('#')[0];