Framework Error

What This Error Means

This error occurs when a templating engine, such as Jinja2, is unable to locate a template file.

Why It Happens

This error typically happens when the template file name is misspelled, the file is not in the expected location, or the directory is not being scanned for templates correctly.

How to Fix It

1. 1To fix this error, ensure the template file exists in the correct location and is named exactly as specified in the code. If the file is in a subdirectory, make sure the directory is being scanned for templates. You can also use the 'auto_reload' feature in Flask to automatically reload templates when changes are made.

Example Code Solution

from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')
def index():
    return render_template('non_existent_template.html')

from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')
def index():
    return render_template('base.html')  # Correct template file name