I'm receiving the following message:
Table name 'IINR(finishes)' uses special characters that are used in expressions and formulas. Consider renaming the table to remove these special characters.
But I checked and there are no special characters inside any title. I also tried to create a new app using a different GSheets, in which a copy paste the titles of the columns and in this case, no warning message.
What can it be the reason? Thanks!
In the end (I didn't read well the message) the problem was on the title of the spreadsheet (table) and not at column level..