graceful error exit

main.py

@@ -66,10 +66,9 @@ async def on_message(message):
 
     question = message.content.replace("<@1243428204124045385>", "")
     engine_response = await llm_output(question)
-    if llm_output != "Error 500":
-        llm_answer, references = engine_response
 
     try:
+        llm_answer, references = engine_response
         start = 0
         while llm_answer[start: start+1990] != "":
             if (start == 0):