Update app.py

app.py

@@ -36,6 +36,13 @@ async def chat(query,history,audience,sources,reports):
     if len(reports) == 0:
         reports = []
 
+    history = [tuple(x) for x in history]
+
+    docs_html = ""
+    output_query = ""
+    output_language = "ENG"
+    
+    yield history,docs_html,output_query,output_language
 
 
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