Update dependency and unpacking bugs

app.py

@@ -112,7 +112,7 @@ def generate_poster(pdf_file, logo_file, aff_logo_file, text_model, vision_model
         error_msg = validate_inputs(pdf_file, logo_file, aff_logo_file, text_model, vision_model, poster_width, poster_height, anthropic_key, openai_key, anthropic_base_url, openai_base_url)
         if error_msg:
             cleanup_api_keys()
-            return None, None, f"❌ {error_msg}", ""
+            return None, f"❌ {error_msg}"
         
         progress(0.1, desc="Initializing...")
         

requirements.txt

@@ -19,7 +19,7 @@ beautifulsoup4>=4.12.0
 urllib3>=2.0.0
 torch>=2.0.0
 torchvision>=0.15.0
-transformers>=4.40.0
+transformers==4.52.4
 diffusers>=0.25.0
 accelerate>=0.30.0
 easyocr>=1.7.0