How to get rid of Internal Server Error when deploying to pythonanywhere?

Question

Flask

Please help me fix the Internal Server Error when deploying to pythonanywhere.
When run on the local server everything works. This is where errors occur.
I used the instruction:
https://ichi.pro/ru/kak-besplatno-razmestit-priloz...

In the error log it says:
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) no such table: item
[SQL: SELECT item. id AS item_id, item.title AS item_title, item.price AS item_price, item.about AS item_about, item.size AS item_size, item.src AS item_src, item.link AS item_link, item."isActive" AS "item_isActive"
FROM item]

Code

from flask import render_template, request, redirect
from flask import Flask
from flask_sqlalchemy import SQLAlchemy


app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///shop.db '
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)


class Item(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(50), nullable=False)
    price = db.Column(db.String(5), nullable=False)
    about = db.Column(db.Text, nullable=False)
    size = db.Column(db.String(50), nullable=False)
    src = db.Column(db.Text, nullable=False)
    link = db.Column(db.Text, nullable=False)
    isActive = db.Column(db.Boolean, nullable=True)

    def __repr__(self):
        return self.title


@app.route('/')
@app.route('/index', methods=['GET', 'POST'])
def index_test():
    items = Item.query.all()  # Можно добавить сортировку .order_by(Item.name).
    return render_template('index.html', db=items)


@app.route('/create', methods=['GET', 'POST'])
def create():
    if request.method == "POST":
        title = request.form['title']
        price = request.form['price']
        about = request.form['about']
        size = request.form['size']
        src = request.form['src']
        link = request.form['link']

        item = Item(
            title=title, 
            price=price, 
            about=about, 
            size=size, 
            src=src, 
            link=link)

        try:
            db.session.add(item)
            db.session.commit()
            return redirect('/index')

        except Warning:
            return "Something is going wrong"

    else:
        return render_template('create.html')


@app.route('/about_us', methods=['GET', 'POST'])
def about_us():
    return render_template('about.html')

Answer 1

no such table:
check if there is a table, if there is - the path to the base is absolute