[FIX] tiki-history_sheets.php : Warning : Undefined array key 'sheetId'
The issue here was that sometimes the sheetId was not given and that's why it was missed in the $_REQUEST array. So I made sure to check if the key sheetId is present in the array before trying to use it. And the message was not well given to smarty so it was not showing the error message, and also update the message from "Incorrect parameter" to "Missing parameter 'sheetId' or Incorrect parameter" so you know what parameter to we are talking about.