diff --git a/lib/providers/websocket.dart b/lib/providers/websocket.dart
index 8d62406..914ea32 100644
--- a/lib/providers/websocket.dart
+++ b/lib/providers/websocket.dart
@@ -152,6 +152,8 @@ class WebSocketProvider extends GetxController {
   }
 
   Future<void> registerPushNotifications() async {
+    if (PlatformInfo.isWeb) return;
+
     final prefs = await SharedPreferences.getInstance();
     if (prefs.getBool('service_background_notification') == true) {
       log('Background notification service has been enabled, skip register push notifications');
diff --git a/lib/widgets/attachments/attachment_editor.dart b/lib/widgets/attachments/attachment_editor.dart
index f8eb736..bedab02 100644
--- a/lib/widgets/attachments/attachment_editor.dart
+++ b/lib/widgets/attachments/attachment_editor.dart
@@ -312,7 +312,9 @@ class _AttachmentEditorPopupState extends State<AttachmentEditorPopup> {
   }
 
   Widget _buildQueueEntry(AttachmentUploadTask element, int index) {
-    final extName = extension(element.file.path).substring(1);
+    final extName = element.file.name.contains('.')
+        ? extension(element.file.name).substring(1)
+        : '';
     final canBeCrop = ['png', 'jpg', 'jpeg', 'gif'].contains(extName);
 
     return Container(