XenForo has always used a single quote in HTML links. Example: Code: [URL='https://www.google.com/']Google[/URL] The inconsistency comes with the newly introduced feature called "Convert URLs to Page Titles". This feature creates HTML links using double quotes: Code: [URL="https://www.google.com/"]Google[/URL] Please change the following XenForo code: XenForo/BbCode/Formatter/BbCode/Autolink.php Line# 261 and 282 PHP: $tag = '[URL="' . $link['url'] . '"]' . $linkTitle . '[/URL]'; change to: PHP: $tag = "[URL='" . $link['url'] . "']" . $linkTitle . "[/URL]"; Thank you.