My input is along the lines of WORKDAY([Start date];10;Holydays[Date]), but it tells me that “WORKDAY has invalid inputs”
The error goes away when I remove the Holydays[Date] input from the formula, but I have double-checked that all the dates are valid, and formatted as dates in both the google sheet and AppSheets
I’m seeing the same issue. A manual list of dates works fine but any select function (e.g. SELECT, FILTER, Holidays[Date]) gives that error. I would report this to support@appsheet.com