19038: Page token must be bigger than or equal to 0

This error occurs when you request Chat resources with a PageToken value that is less than 0. PageToken must be a non-negative integer when you paginate through results.

• The request includes a PageToken query parameter with a negative value
• Your application decrements the page token below 0 while paginating through Chat messages or other list results
• A client-side validation issue allows an invalid PageToken value to be sent to the Chat API
• A variable used to build the request is uninitialized or incorrectly parsed, which results in a negative number

• Update your request so PageToken is set to 0 or a positive integer
• Add input validation before sending the request to prevent negative PageToken values
• Review your pagination logic to make sure previous-page calculations never produce a value below 0
• If you are storing pagination state, confirm the value is preserved correctly between requests
• Test the request with a known valid PageToken value to verify the rest of the request is correct

• Twilio Chat documentation