lib/weblib.php
function get_accesshide($text, $elem='span', $class='', $attrs='') {
return <$elem class=\"accesshide $class\" $attrs>$text<$elem>";
}
It lacks a bar in front of the last $elem, it would be to close the label.
Best regards.
I cannot see this error in Moodle 3.0 or any other version of Moodle. Has someone else modified your source code?
Support for Moodle 3.0 has now ended, it is recommended that you upgrade your site.
Here's the link to that line in Moodle 3.0...
https://github.com/moodle/moodle/blob/v3.0.0/lib/weblib.php#L2125
As you can see, it's not what you have. So....