MC-35220: Page builder can't save content

Author: yelahin-serhiy

app/code/Magento/PageBuilder/view/adminhtml/web/js/content-type/text/preview.js

@@ -153,6 +153,8 @@ export default class Preview extends BasePreview {
 
         const wysiwygConfig = this.config.additional_data.wysiwygConfig.wysiwygConfigData;
 
+        wysiwygConfig.adapter.settings.paste_as_text = true;
+
         if (focus) {
             wysiwygConfig.adapter.settings.auto_focus = this.element.id;
             wysiwygConfig.adapter.settings.init_instance_callback = () => {