META error documentation link https://developers.facebook.com/documentation/business-messaging/whatsapp/support/error-codes
Missing or too many parameters (Usually missing when used via flow; too many only in direct API calls to Meta)
Line breaks.
Missing or too many parametersThe missing parameters usually happens when you don’t define a variable OR when there is a variable defined in the template but the variable field in the lead/deal is empty! So, since it’s empty, it will throw an error!
The too many parameters, I’m almost sure this isn’t your case!
There can be an excess of parameters if you use API calls manually but not in a message block. Example: You set 2 variables in the template and sent 3, but this, again just to make it clear, only happens in direct API calls in Meta. There’s no way for this to happen through message blocks. THIS is 99.99% of the time not the case, exceptions are when using an HTTP block making a call to META or via N8N or another system making direct calls to META.
In short, did you get this error? Check if the lead that threw the error has values in all variables!
Line break inside the variableThe line break is one of the main triggers of error 132018.
If the template was approved with two variables and you send it with these values:
{{1}} = Allan
{{2}} = “We’re waiting for you so we can move forward.
All good?”
The final message will have a different structure from the one that was approved. Notice that right after ‘continuidade’ a line break was made with ‘enter’.
This is not allowed! Line break will generate error 132018.
Even if the content is "within the approved context", the structure changes.
Unrelated tip:
One of the most common mistakes is using the variable for something different from the context approved in the template.
Approved example: "Olá {{1}}, tudo bom? {{2}}, então já sabe, qualquer coisa me chama!"
Where:
{{1}} = Name
{{2}} = Short contextual phrase
Common mistake when sending:
{{1}} = Allan
{{2}} = We're reminding you that your package has arrived and we want to reassure you so you don’t worry. It's safely stored at our HQ.
Final message sent:
Hi Allan, how are you? We're reminding you that your package has arrived and we want to reassure you so you don’t worry. It's safely stored at our HQ, so you know, anything you need just call me!
Problems here:
Too much text inside the variable
Content outside the expected context
Structure different from the approved original intent
Meta accepts dynamic variables, but it's not really appreciated to turn a variable into an entire block of text. Use it knowing it might work today and fail tomorrow.
The ideal is to structure the template leaving only the parts that are really variable as dynamic.
Safer example:
"Hi {{1}}, how are you? We're reminding you that your package has arrived and we want to reassure you so you don’t worry. It's safely stored at our {{2}}, so you know, anything you need just call me!"
Where:
{{1}} = Name
{{2}} = Short location (e.g.: central HQ)
Here:
The variables are small
There is no line break
The context stays true to what was approved
Error 132018 is not an API failure.
It means that:
The structure sent doesn’t match the approved template
There’s a mismatch in the number of variables
The template name or language is incorrect
Whenever this error shows up, review the structure of the approved template and compare it line by line with the JSON you sent.
