Update app.py

app.py

@@ -580,11 +580,14 @@ st.image("Insightzen.png", width=600)
 df = upload_and_select_dataframe()
 
 try:
-    st.subheader("Data preview")
-    st.dataframe(df.head())
-    
-    cols = edit_strings(df.columns)
-    cols = sorted(list(set(cols)))
+    try:
+        st.subheader("Data preview")
+        st.dataframe(df.head())
+
+        cols = edit_strings(df.columns)
+        cols = sorted(list(set(cols)))
+    except:
+        pass
     
     main_option = st.selectbox("Please select an option:", ["Select a Task","Tabulation", "Funnel Analysis", "Segmentation Analysis", "Hypothesis test", "Machine Learning", "Sample Size Calculator" ,"Coding", "AI Chat"])