Getting text from a text box wont work?

I'm trying to make a feedback thing where it will send an HTTP request, but when I try to, it will send the request, but it will send something blank. I think its the script I'm using to get the text. I'm using this script.

script.Parent.Parent.TextBox.Text

I also have it print when it sends the request what is sent, so I'm pretty sure its that. Is there something I'm doing wrong?

Edit: Heres the whole script

local url = ""
local httpservice = game:GetService("HttpService")
 
script.Parent.MouseButton1Click:Connect(function()
    local data = {
    ['embeds'] = {{
            ['title'] = script.Parent.Parent.TextBox.Text;
}}
    }
   
    local finaldata = httpservice:JSONEncode(data)
    httpservice:PostAsync(url, finaldata)
   
end)