@Marcos-silva, I just tested the Alexa TRIGGERcmd Smart Home skill myself and it worked for me.
Have you tried using it without your Alexa Routine? Like just, "Alexa, turn on calculator" ?
One theory I have is maybe you changed something about your command, which would delete and re-create the Alexa device. If so, you'd have to re-add it to your Routine.