small fix

app.py

@@ -830,7 +830,7 @@ def infer_page(
 
     # Check page limit (reduced to 24 for performance)
     if session_manager.metadata["total_pages"] >= 24:
-        return session_state, None, None, f"Page limit reached"
+        return session_state, None, f"Page limit reached"
 
     generated_images = []
     used_seeds = []
@@ -914,7 +914,7 @@ def infer_page(
     next_page_num = page_num + 1
     button_label = f"Generate page {next_page_num}" if next_page_num <= 24 else "Page limit reached"
 
-    return session_state, pdf_path, pdf_path, button_label
+    return session_state, pdf_path, button_label
 
 # New inference function with automatic aspect ratio
 def infer_single_auto(