Http request from relevance AI / Value can't be casted as buffer for parameter 'data'

[FabLaika]

Hi,

I’m trying to send an Http request from relevance ai to Notion API.
When i try using static code it works but when relevance ai sends data to the webhook through variables i get an error.
The variable are recognized but something doesn’t work, alos i have nothing in the input / output bundles

Any ideas ?