Channel invalid content error

Message contains content that is rejected or unsupported by the messaging channel.

• Unable to upload the media used in the message because it is not supported by the messaging channel.
• Length of the parameters and the template text exceeds the allowed length of 1024 for WhatsApp.

• Inspect the media files being sent and confirm their MIME type is in fact supported by the messaging channel.
• Confirm WhatsApp template sends do not exceed 1024 characters, which can occur when placeholder text substitutions or translations are too long.