fix, 3

src/ntp_routes.py

@@ -1,4 +1,4 @@
-from flask import Flask, session, g, render_template_string
+from flask import Flask, session, g, render_template_string, Response
 from loguru import logger
 import json
 import plotly.express as px
@@ -8,6 +8,7 @@ import pandas as pd
 import psycopg
 import sqlalchemy
 import time
+import io
 
 from app import app
 from app import oidc