90040: Broadcast 'MediaUrls' list has too many items

This error occurs when your broadcast request includes more MediaUrl values than Twilio accepts. In Notify, SMS channel-specific media is sent in the sms.media_urls JSON array, and Twilio supports up to 10 media files per message.

• Your request includes more than the supported number of MediaUrl values for a single message.
• Your sms.media_urls JSON array contains too many items.
• Your application repeats MediaUrl fields or appends media URLs dynamically without enforcing the per-message media limit before sending the request.

• Reduce the number of MediaUrl values in the request so the message includes no more than 10 media files.
• If you are using Notify channel-specific payloads, place media in the sms.media_urls JSON array.
• Validate the final media count in your application before you submit the broadcast request.
• Verify that the combined size of the message and its media stays within the destination channel limit before you retry the request.
• If you are starting a new implementation for SMS notifications, use Programmable Messaging for SMS notifications because Notify is deprecated and no longer supported.

• Notification resource
• Media subresource
• Accepted content types for media