[Python] scrapy with css selector : no result

I need to retrieve information from our website but I can't get results with Scrapy. At this stage of the project, I need to retrieve the training labels (for example: Validation of acquired experience)

the url of the site : https://monavenirpro-hdf.fr/formations/

<div class="elementor-widget-wrap elementor-element-populated" xpath="1">
<div class="elementor-element elementor-element-33fed426 elementor-widget__width-auto elementor-widget elementor-widget-heading" data-id="33fed426" data-element_type="widget" data-widget_type="heading.default">
<div class="elementor-widget-container">
<span class="elementor-heading-title elementor-size-default">Accompagnement</span> </div>
</div>
<div class="elementor-element elementor-element-49bd7747 elementor-widget__width-auto elementor-widget elementor-widget-heading" data-id="49bd7747" data-element_type="widget" data-widget_type="heading.default">
<div class="elementor-widget-container">
<span class="elementor-heading-title elementor-size-default" style="">Validation des Acquis de l'Expérience - Livret 2</span> </div>
</div>
</div>


I would like to retrieve the informations in the span :

Accompagnement
Validation des Acquis de l'Expérience - Livret 2


Could you help me ?

Thanks a lot

Voici mon code :

import scrapy

class monavenirpro(scrapy.Spider):
name : "monavenirpro"
start_urls = [""https://monavenirpro-hdf.fr/formations/"]

def parse(self, response):

libelles = response.css("div[class='elementor elementor-44463 dce-elementor-rendering-id-1'] div["
"class='elementor-element elementor-element-49bd7747"
"elementor-widget__width-auto elementor-widget elementor-widget-heading'] span["
"class='elementor-heading-title elementor-size-default']::text").extract()
yield {"listlibelles": libelles}


the terminal returns:

{'listlibelles': []}

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