How to add html in confirmation messages

I tried to write a custom module with this code

<?php

function h5palter_h5p_semantics_alter(&$semantics, $library_name = NULL) {
  // Check if this is the Question Set type.
  if ($library_name !== 'H5P.QuestionSet') {
    return; // Nope, do not continue.
  }
 
  foreach ($semantics as $field) {
    // Go through list fields
    while ($field->type === 'list') {
      $field = $field->field;
    }
 
    // Go through group fields
    if ($field->type === 'group') {
      h5palter_h5p_semantics_alter($field->fields, $library_name); // Check your function name!
      continue;
    }
 
    // Check to see if we have the correct type and widget
    if ($field->type === 'text' && $field->name === 'feedback') {
      $field->widget = 'html';
    }
  }
}

It converts the feedback option in an HTML widget, but a warnings messages are showed when I save the content:

• WARNING: INVALID ARGUMENT SUPPLIED FOR FOREACH() IN H5PCONTENTVALIDATOR->VALIDATEGROUP() (LINE 3601 OF MODULES/H5P/VENDOR/H5P/H5P-CORE/H5P.CLASSES.PHP).
• WARNING: FIRST PARAMETER MUST EITHER BE AN OBJECT OR THE NAME OF AN EXISTING CLASS IN H5PCONTENTVALIDATOR->VALIDATEGROUP() (LINE 3649 OF MODULES/H5P/VENDOR/H5P/H5P-CORE/H5P.CLASSES.PHP).
• WARNING: FIRST PARAMETER MUST EITHER BE AN OBJECT OR THE NAME OF AN EXISTING CLASS IN H5PCONTENTVALIDATOR->VALIDATEGROUP() (LINE 3649 OF MODULES/H5P/VENDOR/H5P/H5P-CORE/H5P.CLASSES.PHP).

and when the Quiz are finished the feedback message still showing as a plain text with the html tags.

Please, can you (or anybody) help me?