API Integration HTTP

It works like this example via CURL:

curl -X 'POST' \
  'https://http.wttz.com/394014db920b713a/rest/envio/VFYCSIA-5QNUP4I-UOCOMEQ-CC7TVXY/texto' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '{
  "messageData": {
    "numero": "5549991414646",
    "text": "Test Now"
  }
}'

Request URL

https://http.wttz.com/394014db920b713a/rest/envio/VFYCSIA-5QNUP4I-UOCOMEQ-CC7TVXY/texto

Response headers

 access-control-allow-origin: * 
 connection: keep-alive 
 content-length: 306 
 content-type: application/json; charset=utf-8 
 date: Thu,25 May 2023 05:24:38 GMT 
 etag: W/"132-7imkh414LcySqxrh9Vx3hTPcX70" 
 server: nginx/1.18.0 (Ubuntu) 
 vary: X-HTTP-Method-Override,Accept-Encoding 
 x-request-id: 7db4bec141344be59324fe7cad1e3585 

this api accepts post in json format
I am using provider sms NotificatorSms me to integrate traccar?

        <entry key='sms.http.url'>org.traccar.sms.HttpSmsClient</entry>
        <entry key='sms.http.url'>https://http.wttz.com/394014db920b713a/rest/envio/VFYCSIA-5QNUP4I-UOCOMEQ-CC7TVXY/texto</entry>
        <entry key='sms.http.template'>
                                            {
                                              "messageData": {
                                                "numero": "{phone}",
                                                "text": "{message}"
                                              }
                                            }
        </entry>

debugging gives the second error

NullPointerException (NotificatorSms:45 < NotificationResource:63 < ...)

I'm on the right track can you help me?????

Are you using the latest official release of Traccar? No customizations?

I'm using the customized 4.15 version plus the http sms api I keep it as the official one

You should try it on the latest official release.

just one more question like this works but putting {message} of the error can help me and some xml conversion to json?
let me know what I really need to put there?

        <entry key='sms.http.url'>org.traccar.sms.HttpSmsClient</entry>
        <entry key='sms.http.url'>https://http.wttz.com/394014db920b713a/rest/envio/VFYCSIA-5QNUP4I-UOCOMEQ-CC7TVXY/texto</entry>
        <entry key='sms.http.template'>
                                            {
                                              "messageData": {
                                                "numero": {phone},
                                                "text": <b>"Test" <--- PASSING A STRING WORKS PASSING {message} the template breaks 
                                              }
                                            }
        </entry>