To duplicate: Open a new text input using v4.3.0 of cli-menu and press the backspace key until there the placeholder text has been deleted, then press it once more.
Expected result: Nothing happens.
Actual result:
Fatal error: Uncaught TypeError: Argument 2 passed to PhpSchool\CliMenu\Input\InputIO::drawInput() must be of the type string, bool given, called in /.../vendor/php-school/cli-menu/src/Input/InputIO.php on line 80 and defined in /.../vendor/php-school/cli-menu/src/Input/InputIO.php on line 205
Also, after the crash the terminal window stops echoing input.
Environment: CentOS 7.9, running PHP 7.4.20

Sample code:
'$result = $menu->askText()
->setPromptText($prompt.' :')
->ask();'

I can replicate this behavior with the text input sample code in the examples directory.