Webste not opening because of APScheduler

[IfeOduyemi]

after adding apsceduler and running the flask code in the terminal using $flask run, the website link wont appear like usual but after removing the apscheduler code the link is sent and i can run my code. Does anyone know how to fix this?

@login_required
def send_mail():
    with app.app_context():
        user = db.execute("SELECT email FROM user WHERE id = 28")
        email = []

        for i in range(len(user)):
            email.append(user[i]["email"])
            user_email = (" ".join(email))

            msg = Message('Medication Tracker', sender="ifeoduyemiwas@gmail.com", recipients=[user_email])
            msg.body = "Remember your event today"
            mail.send(msg)
        
conn = sqlite3.connect('finance.db')
cursor = conn.cursor()
time_event = cursor.execute("SELECT events_time FROM events WHERE user_id = 28")
rows = cursor.fetchall()

scheduler = BackgroundScheduler(daemon=True)

while True:
    for row in rows:
        events_time_str = row[0]
        events_time = datetime.strptime(events_time_str, "%Y-%m-%dT%H:%M")
        scheduler.add_job(send_mail, 'date', run_date=events_time)

    scheduler.start()
    time.sleep(60)

conn.close() ```