Attach all files from a folder to an email

Thank you very much, I've used the extension and the zip is created perfectly. But when i want to send the mail an error occurs.
The error:
Bas arguments to SendMail
The operation SendMail cannot accept the arguments: ,["example@mail.com"],[""],[""],["Fichaje Gon san Mes: 07_2023"],["Archivos adjuntados"],[""]

So what I see is that the zip_file variable is empty, why is that if I'm giving it the value from the extension?

This are the blocks.