Error in Moneries payment API integration

I am from Aldhaaba.com restaurants. I am facing error in integrating moneries payment api.
The error is 

"The 'META' start tag on line 4 position 14 does not match the end tag of 'HEAD'. Line 5, position 9."

 

 The api informations are as below:

 

Store ID: gwca017827

Webiste: https://aldhaaba.com/

Api Versoin: 1.2.7

 

i am setting HttpsPostRequest class  parameters for transaction  are:

 

 HttpsPostRequest mpgReq = new HttpsPostRequest();
 mpgReq.SetProcCountryCode(processing_country_code);
 mpgReq.SetTestMode(false);
 mpgReq.SetStoreId(store_id);
  mpgReq.SetApiToken(api_token);
  mpgReq.SetHost("https://www3.moneris.com");
  mpgReq.SetTransaction(cardVerification);
  mpgReq.SetStatusCheck(status_check);
  mpgReq.Send();

 

Am i missing any parameter or the error is due to some other reason?

Before setting he host i was facing the error "Cancelled: Transaction not allowed.No permission for:'cvd_info". We contact the moneries help line they guided to set host. but after setting host now we are facing this error. 

When i posted this error ""Cancelled: Transaction not allowed.No permission for:'cvd_info"." on this portal, your answer was please check that you are using latest api. but i did not find latest API than 1.2.7 from github link

So please help us to debug this error.

Thank you