Failed opening required JPATH_LIBRARIES.'/joomla/document/html/renderer/head.php

Question

I update my Joomla version from 3.9.13 to 3.9.25 then I received this error:

Warning: require_once(/home/MYHOST/public_html/MYSITE/libraries/joomla/document/html/renderer/head.php): failed to open stream: No such file or directory in /home/MYHOST/public_html/MYSITE/templates/MYTEMPLATE/error.php on line 44

Fatal error: require_once(): Failed opening required '/home/MYHOST/public_html/MYSITE/libraries/joomla/document/html/renderer/head.php' (include_path='.:/opt/cpanel/ea-php73/root/usr/share/pear') in /home/MYHOST/public_html/MYSITE/templates/MYTEMPLATE/error.php on line 44

I searched online and found this advice:

in MYTEMPLATE error.php change this line

require_once(JPATH_LIBRARIES.'/joomla/document/html/renderer/head.php');

to this:

if (!class_exists('JDocumentRendererHead')) {
    $head = JPATH_LIBRARIES . '/joomla/document/html/renderer/head.php';
    if (file_exists($head)) {
        require_once($head);
    }
}

My problem was fixed, but then I got error 404 and this error:

linkGraylighter is undefined: /home/MYHOST/public_html/MYSITE/templates/MYTEMPLATE/less/presets.less on line 204

I checked this line, but I can't find any code here just some enter...

I delete enter, but I receive error on line 203 and in 203 line you can see just ( } ).

Answer 1

I find my problem.

For fix this problem :

Go to Helix template > advanced tab > Compile LESS to CSS = NO