TM4B sms notification

Hello everyone! I would like to ask for help with regards to setting up appointment notification using TM4B. I don’t have much knowledge when it comes to programming, so I just followed everything I’ve seen on the wiki and on threads on sourceforge and this forum. I tried the simple hack on the SMS notification and I keep getting “Error in SMS authorization! (ERR: 108, Invalid or missing api_id).” I’m using OpenEMR Version Number: v5.0.1 (6) on windows 10 home basic.