[Python] My Flask app is locally working but not able to deploy globally

I have the Flask app with implementing Meta.AI. It is running successfully in my local. I am getting the proper response from the Chatbot. But when I deploy in Global Like Render, Vercel, Heroku, I do not get a reaction from chatbot. I am always getting internal server errors.

Here is my code App.py:

from flask import Flask, render_template, request, jsonify
from meta_ai_api import MetaAI
from flask_cors import CORS
import logging
from main import MetaAI
import sys
import os

current_dir = os.path.dirname(os.path.abspath(__file__))
src_dir = os.path.dirname(current_dir)
sys.path.insert(0, src_dir)


app = Flask(__name__)
CORS(app, resources={r"/*": {"origins": "*"}})


ai = MetaAI()

logging.basicConfig(level=logging.DEBUG)


# Serve the HTML file
@app.route('/')
def home():
return render_template('index.html')

# API endpoint
@app.route('/endpoint', methods=['POST'])
def handle_chatbot_request():
message = request.json['message']
response = ai.prompt(message)
return jsonify({'response': response})


if __name__ == '__main__':
# app.run(debug=True)

#if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0', port=5000)

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