Every page view generates 10-20 warnings per accordion

Attempting to create a batch with 8.x-dev the repository doesn't appear actually have all of the code in the official release. So I can't create a patch.

ckeditor_accordion/src/Plugin/Filter/CKEditorAccordion.php

-- Line 60
From

// Load the text into a dom object.
    $dom = new \DOMDocument();
    $dom->loadHTML(mb_convert_encoding($text, 'HTML-ENTITIES', 'UTF-8'));
    $xpath = new \DOMXPath($dom);

to line 60

// Load the text into a dom object.
    $dom = new \DOMDocument('1.0');
    libxml_use_internal_errors(true);
    $dom->loadHTML(mb_convert_encoding($text, 'HTML-ENTITIES', 'UTF-8'));
    libxml_clear_errors();
    $xpath = new \DOMXPath($dom);

This properly validates the DOM object and suppresses false negatives for invalid entities.

Created a branch with missing source code and fix for this error.

https://git.drupalcode.org/project/ckeditor_accordion/-/merge_requests/8

oh I guess I can't push. :(

I am also getting this error on version 2.0.3 where we have content with xml language tags.

Warning: DOMDocument::loadHTML(): Attribute xml:lang redefined in Entity, line: 1 in ckeditor_accordion/src/Plugin/Filter/CKEditorAccordion.php on line 61

I have tried the fix from @emptyvoid and it resolves the issue.

Updated from line 59 to 64:

// Load the text into a dom object.
    $dom = new \DOMDocument();
    libxml_use_internal_errors(true);
    $dom->loadHTML(mb_convert_encoding($text, 'HTML-ENTITIES', 'UTF-8'));
    libxml_clear_errors();
    $xpath = new \DOMXPath($dom);

This issue is caused by the patch for issue 3124167 📌 Provide an accessible variant Needs review

I have created a updated on the patch that fixes this issue and is available on 3124167 #30 📌 Provide an accessible variant Needs review

Confirmed llewellyn.dawson on the 2.0-dev branch this patches and suppresses the errors!