Bug: Error Message No Displayed

I couldn’t see where the flow is failed.

File :

Payload :
{

"leads": [

{

"name": "Daniel Ross",

"email": "daniel.ross@gmail.com",

"company": "",

"message": "Not sure what this product actually does. Just browsing.",

"source": "paid_ad"

},

{

"name": "Emily Clark",

"email": "emilyc@yahoo.com",

"company": "",

"message": "Saw this on social media. Can you share more basic info?",

"source": "social_media"

},

{

"name": "Rahul Mehta",

"email": "rahul123@gmail.com",

"company": "",

"message": "Is this free to use?",

"source": "landing_page"

},

{

"name": "Olivia Brown",

"email": "olivia.brown@gmail.com",

"company": "",

"message": "Just exploring options. No specific plan yet.",

"source": "blog_post"

},

{

"name": "Chris Evans",

"email": "cevans@hotmail.com",

"company": "",

"message": "Can you explain what problem this solves?",

"source": "social_media"

}

]

}