92007: The Content Variables Parameter is invalid

This error occurs when ContentVariables is not sent in a valid format. Send ContentVariables as a JSON string of key-value pairs for the variables in your content template. When you include ContentVariables, also include ContentSid.

• You sent ContentVariables as an object, array, or another value instead of a JSON string.
• The JSON string is malformed because it contains invalid quotes, commas, braces, or escaping.
• One or more ContentVariables values are null or empty strings.
• For approved WhatsApp templates, a variable value contains a newline.

• Serialize the variable payload to a JSON string before sending the request. If you use a helper library, pass contentVariables: JSON.stringify({...}).
• Validate the JSON before sending the request and confirm it contains valid key-value pairs for your template variables.
• Include ContentSid with ContentVariables.
• Replace null or empty values with valid substitutions, or omit a value so the template can use its default placeholder value.
• If you are sending an approved WhatsApp template, remove newline characters from variable values and verify the template follows WhatsApp variable rules.

• Using Variables with Content Templates
• Content API public endpoints
• Message resource