diff --git a/backend/static/scripts/api.js b/backend/static/scripts/api.js
index 10e3cf0..37c3d3c 100644
--- a/backend/static/scripts/api.js
+++ b/backend/static/scripts/api.js
@@ -3,9 +3,8 @@
  * Handles all communication with the backend
  */
 
-const API_BASE = window.location.origin.includes('localhost') || window.location.origin.includes('127.0.0.1')
-    ? '/api'
-    : 'https://nf.khoavo.myds.me/api';
+// Hardcode API_BASE to ensure Android App works correctly
+const API_BASE = 'https://nf.khoavo.myds.me/api';
 // In production, this should NOT be hardcoded if possible, or obfuscated.
 // Simple obfuscation for the secret key (should be improved in production)
 const _s = [121, 111, 117, 114, 45, 115, 117, 112, 101, 114, 45, 115, 101, 99, 114, 101, 116, 45, 107, 101, 121, 45, 99, 104, 97, 110, 103, 101, 45, 116, 104, 105, 115];
diff --git a/backend/static/scripts/main.js b/backend/static/scripts/main.js
index ab849f3..01f4885 100644
--- a/backend/static/scripts/main.js
+++ b/backend/static/scripts/main.js
@@ -2314,6 +2314,7 @@ async function renderCategoryView(viewType) {
         }
     } catch (error) {
         console.error('Error rendering category view:', error);
+        showToast('Connection failed: ' + error.message, 'error');
         elements.videoGrid.innerHTML = `
             <div class="flex flex-col items-center justify-center py-20 text-gray-400">
                 <span class="material-symbols-outlined text-6xl mb-4 opacity-30">error</span>
diff --git a/frontend/scripts/api.js b/frontend/scripts/api.js
index 10e3cf0..37c3d3c 100644
--- a/frontend/scripts/api.js
+++ b/frontend/scripts/api.js
@@ -3,9 +3,8 @@
  * Handles all communication with the backend
  */
 
-const API_BASE = window.location.origin.includes('localhost') || window.location.origin.includes('127.0.0.1')
-    ? '/api'
-    : 'https://nf.khoavo.myds.me/api';
+// Hardcode API_BASE to ensure Android App works correctly
+const API_BASE = 'https://nf.khoavo.myds.me/api';
 // In production, this should NOT be hardcoded if possible, or obfuscated.
 // Simple obfuscation for the secret key (should be improved in production)
 const _s = [121, 111, 117, 114, 45, 115, 117, 112, 101, 114, 45, 115, 101, 99, 114, 101, 116, 45, 107, 101, 121, 45, 99, 104, 97, 110, 103, 101, 45, 116, 104, 105, 115];
diff --git a/frontend/scripts/main.js b/frontend/scripts/main.js
index ab849f3..01f4885 100644
--- a/frontend/scripts/main.js
+++ b/frontend/scripts/main.js
@@ -2314,6 +2314,7 @@ async function renderCategoryView(viewType) {
         }
     } catch (error) {
         console.error('Error rendering category view:', error);
+        showToast('Connection failed: ' + error.message, 'error');
         elements.videoGrid.innerHTML = `
             <div class="flex flex-col items-center justify-center py-20 text-gray-400">
                 <span class="material-symbols-outlined text-6xl mb-4 opacity-30">error</span>