We made a form with contact form7 in WordPress (original theme).
There is no problem with functions such as sending and receiving, but error messages are displayed twice. I want to eliminate the error message in the above four lines.

HTML description of the form part of the original theme

<section>
 Application for membership 
<? php echo do_shortcode ('[contact-form-7 title = "Membership application form"]');?>
</section>

↓Error message source (HTML)

<section>
     Application for membership 
    
        
             There is a problem with the input contents. Please check the contents and try again.
                <ul>
                    <li>Please fill in the required fields.</li>
                    <li>Please fill in the required fields.</li>
                    <li>Please fill in the required fields.</li>
                </ul>
            
            <form action = "/ # wpcf7- ■■-■■" method = "post" novalidate = "novalidate">
                
                    <input type = "hidden" name = "_ wpcf7" value = "■" />
                    <input type = "hidden" name = "_ wpcf7_version" value = "5.1.5" />
                    <input type = "hidden" name = "_ wpcf7_locale" value = "en" />
                    <input type = "hidden" name = "_ wpcf7_unit_tag" value = "wpcf7- ■■-■■" />
                    <input type = "hidden" name = "_ wpcf7_container_post" value = "0" />
                    <input type = "hidden" name = "g-recaptcha-response" value = "" />
                
                <dl>
                    <dt>your name<span>required</span></dt>
                    <dd><span>
                        <input type = "text" name = "■■■■" value = "" size = "40" aria-required = "true" aria-invalid = "true" placeholder = "Example: ■■■■■■■ ■ "/>
                        <span role = "alert">Please fill in the required fields.</span>
                        </span>
                    </dd>
                    <dt>■■■■<span>Required</span></dt>
                    <dd>
                        <span>
                        <input type = "text" name = "■■■■" value = "" size = "40" aria-required = "true" aria-invalid = "true" placeholder = "Example: ■■■■■■■ ■ "/>
                    </dd>
                    <dt>Email address<span>Required</span></dt>
                    <dd>
                        <span>
                        <input type = "email" name = "■■■■" value = "" size = "40" aria-required = "true" aria-invalid = "true" placeholder = "Example: ■■■■■■■ ■ "/>
                        <span role = "alert">Please fill in the required fields.</span>
                        </span>
                    </dd>
                    <dt>phone number<span>any</span></dt>
                    <dd>
                        <span>
                        <input type = "tel" name = "■■■■" value = "" size = "40" aria-invalid = "false" placeholder = "Example: 000-0000-0000" />
                        </span>
                    </dd>
                    <dt>Question etc.<span>Optional</span></dt>
                    <dd>
                        <span>
                        <textarea name = "■■■■" cols = "40" rows = "10" aria-invalid = "false" placeholder = "Please enter any questions."></textarea>
                        </span>
                    </dd>
                </dl>
                <p>
                    <span><span>
                            <span>
                            <label>
                                <input type = "checkbox" name = "■■■■" value = "1" aria-invalid = "false" />
                                <span>We will send your personal information with your consent.</span>
                            </label>
                            </span>
                        </span>
                    </span>
                </p>
                <p>
                    <input type = "submit" value = "Apply with the above contents" />
                </p>
                
                    There is a problem with the input contents. Please check the contents and try again.
                
            </form>
        
    
</section>

The original theme fanctions.php is empty.
We are in trouble without repairing. .

Resolved!

In response to your answers, add a CSS file

/* Clear error message * /
div.screen-reader-response {
  display: none;
}

It disappeared neatly when I added