PV-battery commercial: monthly_grid_to_batt not assigned

Hello everyone,
I'm trying to run a PV-battery project. I set the system as an AC connected; the BTM, in the battery dispatch menu, is set on "input grid power target". Simulation ends with the following error: 
Simulation cashloan failed :monthly_grid_to_batt not assigned.
Values of "monthly grid power targets" in Battery dispatch are assigned: they are set as 1 and I also tried setting them as 10. 
How can I solve this problem? How to correctly configure the setup?
Thank you 

Hi Alessio,

Please attach a copy of the .sam file that generates this error if you would like me to help troubleshoot.

Best regards,
Paul.

Hi, 
the file is already attached in the message. Anyway here it is again. 
SAM version 2022.11.21

Thank you.
Best regards.

Alessio