Errors when mqtt connect with AWSIOT using nodeMCU

Please help with this.
Error Build error: invalid use of template-name ‘MQTTClient’ without an argument liste 60:1
Error GCC ‘MQTTClient’ does not name a type 60:1
Error Build error: expected initializer before 'void’e 75:1
Error GCC expected initializer before ‘void’ 75-1


Have you tried Stage version of ESP8266 Core?