Trouble Creating Tickets in Zendesk API: Invalid Requester Information

I've been having trouble creating tickets using the Zendesk API on my website. Here's what's going on:

Problem: When I try to create a ticket, I keep getting an error. The request seems to be formatted correctly with all the needed details, but I still get an error message.

Error Message: "Error creating ticket: [ZD-1234: Unable to create ticket. Invalid requester information provided]."

Steps to Reproduce:

Make a POST request to the Zendesk API endpoint for ticket creation.
Include all the required details like subject, description, requester information, etc.
Receive the error response mentioned above.

Expected Behavior: I expect the API to create a ticket and return a valid ticket ID. Right now, it’s not working.

I’d appreciate any help to figure out and fix this issue. If more details or logs are needed, just let me know, and I'll provide them quickly.

Thanks for your help!