Open file action doesn't work ( file generated with automation in Google Drive)

[Giacomo_Ria]

Hi all,

I have created in my App an automation BOT to create a File (.pdf) and save it into a folder in Google Drive.

The name of the files is set with a formula which is:

CONCATENATE(“IRCA.”,[IDProposal])

I use the default folder path of AppSheet.
So i created a new column in my Google Sheets named “File” and an “Open file” action to write the folder path in this column, which is:

CONCATENATE(“Files/”,“IRCA.”&[IDProposal],".pdf")

I can’t understand why it doesn’t work when i try to open the file.
I receive this error:

Thank you in advance for helping me.