start

app.py

@@ -1,6 +1,8 @@
 import streamlit as st
 import pandas as pd
 import plotly.express as px
+import matplotlib
+matplotlib.use('Agg')
 import matplotlib.pyplot as plt
 import json
 import os
@@ -140,7 +142,7 @@ else:
 
     with chart_col:
         st.caption("Native chart (always on)")
-        st.area_chart(df_cohorts.set_index("cohort_day")["user_count"], use_container_width=True)
+        st.area_chart(df_cohorts, x="cohort_day", y="user_count", use_container_width=True)
 
         try:
             st.caption("Plotly chart")