**I'm working on this script to send messages to all the phone numbers from a csv that's how I formatted the csv **

 Phone Number,Message 
+16478xxxxx,Hi this is a test text me back if you have received it  
+14164xxxxx,Hi this is a test text me back if you have received it   
+12263xxxxx,Hi this is a test text me back if you have received it

on run {input, parameters}
    set csvFilePath to POSIX path of (path to desktop as text) & "contacts.csv"
    
    -- Read CSV file
    set contactsData to readCSV(csvFilePath)
    
    -- Loop through each row (phone number & message)
    repeat with contact in contactsData
        set {targetBuddyPhone, targetMessage} to contact
        
        -- Open Messages manually to avoid issues
        tell application "Messages" to activate
        delay 2
        
        -- Use AppleScript shell command to send message
        set sendCommand to "osascript -e 'tell application \"Messages\" to send \"" & targetMessage & "\" to buddy \"" & targetBuddyPhone & "\"'"
        do shell script sendCommand
        delay 2
    end repeat
    
    return input
end run


-- Function to Read CSV
on readCSV(csvPath)
    set contactsList to {}
    set csvData to do shell script "cat " & quoted form of csvPath
    set csvLines to paragraphs of csvData
    
    repeat with i from 2 to count of csvLines -- Skip header row
        set rowData to item i of csvLines
        set rowValues to split(rowData, ",")
        
        if (count of rowValues) ≥ 2 then
            set end of contactsList to {item 1 of rowValues, item 2 of rowValues}
        end if
    end repeat
    
    return contactsList
end readCSV


-- Function to Split Text by Delimiter
on split(inputText, delimiter)
    set oldDelim to AppleScript's text item delimiters
    set AppleScript's text item delimiters to delimiter
    set outputList to text items of inputText
    set AppleScript's text item delimiters to oldDelim
    return outputList
end split

im getting this result what's going on can't understand im pretty new to this

error "" number -1721

iMessages is running in the background