What documentation are you reading ckant8?

Win32::GUI::Textfield doesn't mention -text at all

-text appears in Win32::GUI::Reference::Options, but that doesn't mean Textfield accepts this option

Also, -textfield takes a string, not an array or a list,

If you take a page from Basic debugging checklist and replade  $main->AddTextfield with print Dumper you'll see what is between -text and -pos is not a single string