validation error

please fix

wp-content\plugins\constant-contact-forms\includes\class-display.php

// If we have an error.
if ( $field_error ) {
  // Tack that sucker on to the end of our input.
  $classes[] = 'class="ctct-invalid"';
}

to

// If we have an error.
if ( $field_error ) {
  // Tack that sucker on to the end of our input.
  $classes[] = 'ctct-invalid';
}