The textarea is hidden. The 'required' attribute lead to the issue that the form could not be submitted in the browser.
-<textarea id="{$option->optionName}" name="values[{$option->optionName}]" cols="40" rows="10"{if $option->required} required{/if} class="wysiwygTextarea" data-disable-attachments="true">{$value}</textarea>
+<textarea id="{$option->optionName}" name="values[{$option->optionName}]" cols="40" rows="10" class="wysiwygTextarea" data-disable-attachments="true">{$value}</textarea>
{include file='wysiwyg' wysiwygSelector=$option->optionName}
<script data-relocate="true">
$(function() {
$('#{$option->optionName}').parents('dl:eq(0)').addClass('wide');
});
-</script>
\ No newline at end of file
+</script>