Error "cstddef: No such file or directory" on use AzureIoTHub

Good Morning I'm trying to integrate with Azure IoT with Arduino Mega 2560. I imported the AzureIoTHub and AzureIoTUtility lib.

I just created this part of the code

 #include <AzureIoTHub.h>

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

however, when I compile, I get the following error message.

In file included from C:\Users\MercurioNote\Documents\Arduino\libraries\AzureIoTUtility\src/azure_c_shared_utility/platform.h:7:0, from C:\Users\MercurioNote\Documents\Arduino\libraries\AzureIoTUtility\src/AzureIoTUtility.h:7, from C:\Users\MercurioNote\Documents\Arduino\libraries\AzureIoTHub\src/AzureIoTHub.h:7, from D:\Documents\Dev\Pocos\Arduino\ArduinoSolution\ArduinoSolution.ino\WiFiPoco\RoboCore\azureHub\azureHub.ino:3: C:\Users\MercurioNote\Documents\Arduino\libraries\AzureIoTUtility\src/azure_c_shared_utility/strings.h:8:10: fatal error: cstddef: No such file or directory #include

I imported ArduinoStl and the problem continued.

what am i doing wrong in this case?

thanks