Data preview vs scrape action

hi !
when i execute the action "data preview" i have some data returned, but when i execute the "scrape" action, there is no data returned. what could be the reason for this please ?

Url: http://example.com
https://www.inspireuplift.com/kitchen-household/lazy-mop-slippers

Sitemap:
{"_id":"inspire1","startUrl":["https://www.inspireuplift.com/kitchen-household/lazy-mop-slippers"],"selectors":[{"id":"titre","type":"SelectorText","parentSelectors":["_root"],"selector":"span[itemprop='name']","multiple":false,"regex":"","delay":0},{"id":"prix_fin","type":"SelectorText","parentSelectors":["_root"],"selector":"#product-price-679 span","multiple":false,"regex":"","delay":0},{"id":"descrip","type":"SelectorText","parentSelectors":["_root"],"selector":"div#description","multiple":false,"regex":"","delay":0},{"id":"images_url","type":"SelectorGroup","parentSelectors":["_root"],"selector":"div[class='fotorama__thumb fotorama_vertical_ratio fotorama__loaded fotorama__loaded--img'] > img[class^='fotorama__img']","delay":0,"extractAttribute":"src"},{"id":"prix_ini","type":"SelectorText","parentSelectors":["_root"],"selector":".price-wrapper span","multiple":false,"regex":"","delay":0}]}