Update app.py

app.py

@@ -9,6 +9,8 @@ hf = HuggingFaceInstructEmbeddings(
     embed_instruction="Represent the document for retrieval: ",
     query_instruction="Represent the query for retrieval: "
 )
+# Add a padding token to the tokenizer
+hf.tokenizer.add_special_tokens({'pad_token': '[PAD]'})
 
 # Load and process the PDF files
 loader = PyPDFLoader("./new_papers/ReACT.pdf")