Zabbix error telegram

[gleisonsouza]

Media type test failed.

• Sending failed: TypeError: cannot read property 'description' of null.

[gleisonsouza]

var Telegram = {
token: null,
to: null,
message: null,
proxy: null,
parse_mode: null,

sendMessage: function() {
var params = {
chat_id: -50...,
text: Telegram.message,
disable_web_page_preview: true,
disable_notification: false
},
data,
response,
request = new CurlHttpRequest(),
url = 'https://api.telegram.org/bot' + Telegram.token + '/sendMessage';

if (Telegram.parse_mode !== null) {
params['parse_mode'] = Telegram.parse_mode;
}

if (Telegram.proxy) {
request.SetProxy(Telegram.proxy);
}

request.AddHeader('Content-Type: application/json');
data = JSON.stringify(params);

// Remove replace() function if you want to see the exposed token in the log file.
Zabbix.Log(4, '[Telegram Webhook] URL: ' + url.replace(Telegram.token, 'TOKEN)) ;
Zabbix.Log(4, '[Telegram Webhook] params: ' + data);
response = request.Post(url, data);
Zabbix.Log(4, '[Telegram Webhook] HTTP code: ' + request.Status());

try {
response = JSON.parse(response);
}
catch (error) {
response = null;
}

if (request.Status() !== 200 || typeof response.ok !== 'boolean' || response.ok !== true) {
if (typeof response.description === 'string') {
throw response.description;
}
else {
throw 'Unknown error. Check debug log for more information.'
}
}
}
}

try {
var params = JSON.parse(value);

if (typeof params.Token === 'undefined') {
throw 'Incorrect value is given for parameter "Token": parameter is missing';
}

Telegram.token = params.Token;

if (params.HTTPProxy) {
Telegram.proxy = params.HTTPProxy;
}

if (['Markdown', 'HTML', 'MarkdownV2'].indexOf(params.ParseMode) !== -1) {
Telegram.parse_mode = params.ParseMode;
}

Telegram.to = params.To;
Telegram.message = params.Subject + '\n' + params.Message;
Telegram.sendMessage();

return 'OK';
}
catch (error) {
Zabbix.Log(4, '[Telegram Webhook] notification failed: ' + error);
throw 'Sending failed: ' + error + '.';
}

[ChandarbeerNegi]

Hi,
I am getting error while sending telegram alerts using zabbix UI.
Please note that i am using proxy in between and able to send test message using curl but not able send test alert using ZABBIX UI. Please find the attached screenshot of the same.