Flask unable to capture 404 errors, as for some reason it returns 500 error whilst attempting to handle

@app.route('/', defaults={'path': ''})
@app.route('/')
def catch_all(path):
    print(f'recieved invalid request attempt of /{path}')
    return render_template('redirect.html', reason='Unrecognised endpoint.')

@app.errorhandler(404)
def page_not_found(error):
    return render_template('errorpage.html'), 404

app.register_error_handler(404, page_not_found)