Problem using tweepy the error 403 Forbidden apeared without making any changes

Hello there thanks for reading my post. I was using this same code yesterday and it was okay but today stoped working and i got this error:

raise Forbidden(response) tweepy.errors.Forbidden: 403 Forbidden 
When authenticating requests to the Twitter API v2 endpoints, you must use keys and tokens from a Twitter developer App that is attached to a Project. You can create a project via the developer portal.

This is the code I implemented:

import tweepy
import csv

#Autorización
bearer_token = ""
client = tweepy.Client(bearer_token=bearer_token)

#Get the user id
user=""
user_id= client.get_user(username=user).id

# Get all the tweets of a user 
paginator = tweepy.Paginator(
                                client.get_users_tweets,               # The method you want to use
                                user_id,                            # Some argument for this method
                                #end_time=datetime.datetime(2022, 3, 3, 19, 4, 49),
                                tweet_fields=["created_at", 
                                              "public_metrics",
                                              "possibly_sensitive",
                                              "attachments",
                                              "in_reply_to_user_id"],
                                max_results=100,                       # How many tweets per page
                                limit=40                                # How many pages to retrieve
                            )
data=[]
count=0

#Create a csv file to store the data
filename="@"+user+"_twitterdata.csv"
f = open(filename,'a', newline='')
writer = csv.writer(f)

#Store the data
for tweet in paginator.flatten(limit=40000): # Total number of tweets to retrieve
    count=count+1
    #Check if tha tweet has multimedia content
    if tweet.attachments!=None:media=True
    else:media=False
    #Check if tha tweet is a retweet
    Retweet=tweet.text[:2]=="RT"
    #Check if tha tweet is a repy
    Reply=tweet.in_reply_to_user_id!=None
    
    row=[tweet.id,
          tweet.created_at,
          tweet.public_metrics.get("retweet_count"),
          tweet.public_metrics.get("reply_count"),
          tweet.public_metrics.get("like_count"),
          tweet.public_metrics.get("quote_count"),
          tweet.public_metrics.get("impression_count"),
          tweet.possibly_sensitive,
          media, 
          #tweet.text.replace(",", "" ),
          Retweet,
          Reply
          #tweet.context_annotations
          ]
    writer.writerow(row)
    print("Retrieved ",count," tweets")

# Write the data and close file
writer = csv.writer(f)
f.close()

I tried to generate new keys in the developer portal but that didn't help. Also i tried to change the User autentication settings in the twitter developer portal but that didn't work

With the "free" plan of the Twitter API you can no longer lookup tweets, GET /2/tweets/:id is only available in the "basic" plan, see: https://developer.twitter.com/en/portal/products/free