I’m trying to make an project on Flask here is the code below.

My directory is like this

from flask import Flask,render_template,url_for,request,redirect
import pymongo

app= Flask(__name__,static_url_path='', 
            static_folder='static',
            )

@app.route('/admin')
def index():
    return render_template('admin/index.html')

@app.route('/admin/campaigns')
def campaigns():
    return render_template('admin/campaigns.html')