diff --git a/src/backend/langflow/chat/manager.py b/src/backend/langflow/chat/manager.py
index 7c3a08240..4a1b8e77c 100644
--- a/src/backend/langflow/chat/manager.py
+++ b/src/backend/langflow/chat/manager.py
@@ -144,6 +144,8 @@ class ChatManager:
                 if isinstance(msg, FileResponse):
                     if msg.data_type == "image":
                         # Base64 encode the image
+                        if isinstance(msg.data, str):
+                            continue
                         msg.data = pil_to_base64(msg.data)
                     file_responses.append(msg)
                 if msg.type == "start":