apple script numbers regarding picking up pop up values in form with script

Trying to pickup pop up values from a specific sheet in form to update records ( see code below ). As per Getting error as below : .. what is the mistake ?

- Get Cat options from "Sheet2" column B

tell application "Numbers"

set catPopUpOptions to {}

tell document "Monthly expenses"

tell sheet "Sheet4" -- Replace "Sheet2" with the name of your other sheet

set catPopUpOptions to value of range "B2:B"

end tell

end tell

end tell

-- Show pop-up menu for Cat field

set chosenCategory to choose from list catPopUpOptions with prompt "Choose a category:" default items ""

repeat

set chosenCategory to choose from list catPopUpOptions with prompt "Choose a category:" default items ""

try

if chosenCategory is false then error "User canceled category selection."

end try

end repeat

set userInput to item 1 of chosenCategory

display dialog "Chosen category: " & userInput

error on running this code : error "Numbers got an error: Can’t get range \"B2:B\" of sheet \"Sheet4\" of document \"Monthly expenses\"." number -1728 from range "B2:B" of sheet "Sheet4" of document "Monthly expenses"