WhatsApp error 135000 Message rejected for an unspecified reason

Transient — may succeed on retry Meta-side Sending and connection errors

Short answer

WhatsApp rejected the message because of an unknown problem with the details of what was sent, and Meta does not say which detail caused it.

Checked against Meta docs on 2026-08-24 Official source

How to fix it

Send the message again.
If the error keeps happening, contact WhatsApp support with error code 135000, the time of the failure, and the exact message you were sending — WhatsApp's own guidance for this code is to contact support when it keeps repeating.

Meta's official wording for this code

Description Message failed to send because of an unknown error with your request parameters. Meta's suggested solution See the endpoint's reference to determine if you are querying the endpoint using the correct syntax. Contact customer support if you continue receiving this error code in response.

Other codes in the same category

Common questions about this code

What does WhatsApp error 135000 mean?

WhatsApp rejected the message because of an unknown problem with the details of what was sent, and Meta does not say which detail caused it.

Can I just send the message again?

Yes. This error is transient, and the send may succeed on a retry with no changes.

Is this a problem with my account?

This sits with Meta; there is no direct action on your side.

Still hitting this error?

Send us the code and a screenshot and we will read it with you. With LetsBot, the reason each message failed appears next to it in the campaign report instead of a bare number.