Trouble to access published google spreadsheet in shinyapp

Hi,

I have a shinyapp that works with some google spreadsheets.

I've made each google sheet accesible with public access and then the shinyapp download the .csv files from these sheets, but now the shinyapp can't access some os these files...

My question is: "Why google is not allowing access to these public files?"

And the google sheets are from different users...

Thanks