Error compiling for board SODAQ ExpLoRer

Hi, I am trying to setup the Sodaq ExpLoRer. I have been following the setup guide (link below) step by step.

When I copied and pasted the Sodaq demo code into the Arduino IDE and click verify, it gives me the error as below.

C:\Users\Keng Chuen\Documents\Arduino\libraries\Sodaq_RN2483\src\Sodaq_RN2483.cpp:24:23: fatal error: Sodaq_wdt.h: No such file or directory

#include <Sodaq_wdt.h>


compilation terminated.

exit status 1
Error compiling for board SODAQ ExpLoRer.

I checked the code and this code (#include <Sodaq_wdt.h>) was never used.
Not really sure what is happening here. Hopefully this can be resolved ASAP.
Thank you.