chat context load fix

app.py

@@ -384,10 +384,11 @@ def chat_help(plant_disease_class):
         st.chat_message(msg["role"]).write(msg["content"])
 
     if prompt := st.chat_input():
+        client_chat = OpenAI(api_key = st.secrets["OPENAI_API_KEY"])
         st.session_state.messages.append({"role": "system", "content": "Limit responses to " + plant_disease_class})
         st.session_state.messages.append({"role": "user", "content": prompt})
         st.chat_message("user").write(prompt)
-        response = client_d.chat.completions.create(model="gpt-4-turbo", messages=st.session_state.messages)
+        response = client_chat.chat.completions.create(model="gpt-4-turbo", messages=st.session_state.messages)
         msg = response.choices[0].message.content
         st.session_state.messages.append({"role": "assistant", "content": msg})
         st.chat_message("assistant").write(msg)