Can't extract a link URL, output is good in preview and null after scrap

I do not manage to scrap the Linkedin URL from the person detail page.

Url: https://app.swapcard.com/event/global-summit-2020/person/RXZlbnRQZW9wbGVfMjU0NDczMA%3D%3D

Sitemap:
{"_id":"delete","startUrl":["https://app.swapcard.com/event/global-summit-2020/person/RXZlbnRQZW9wbGVfMjU0NDczMA%3D%3D"],"selectors":[{"id":"Linkedin_link","type":"SelectorElementAttribute","parentSelectors":["_root"],"selector":".sc-DNdyV a:nth-of-type(1)","multiple":false,"extractAttribute":"href","delay":0}]}