error: 2: require_once(/home/chatcuck/public_html/Sources/Multimedia): Failed to open stream: No such file or directory [duplicate]

I get these errors in my log daily.The links are malformed. When clicked they generate these error and white screen. None of the other similar questions and answers address this problem. The directory exists and permissions to access it are fine.

Fatal error: Uncaught Error: Failed opening required ‘/home/chatcuck/public_html/Sources/Multimedia/’ (include_path=’.:/opt/cpanel/ea-php80/root/usr/share/pear’) in /home/chatcuck/public_html/Sources/Multimedia/Multimedia.php:173 Stack trace: #0 /home/chatcuck/public_html/index.php(172): multimedia_main() #1 {main} thrown in /home/chatcuck/public_html/Sources/Multimedia/Multimedia.php on line 173

https://chatcuck.com/index.php?seomod=multimedia%2Fsa%3Ddetailslid%3D355;action=multimedia;multimedia=1;sa=detailslid
/home/chatcuck/public_html/Sources/Multimedia/Multimedia.php (Line 173)
Backtrace information

Type of error: General
Error message Select
2: require_once(/home/chatcuck/public_html/Sources/Multimedia): Failed to open stream: No such file or directory

The code from multimedia.php lines 165-182

// Now what we should do if we don't have a SubAction
    if (empty($_REQUEST['sa']))
    {
        multimedia_index();
        loadtemplate('Multimedia');
    }   
    else
    {
        require_once(MM_SRC_FOLDER . '/' . @$subActions[$_REQUEST['sa']][0]);
        $subActions[$_REQUEST['sa']][1]();
        $sa = $_REQUEST['sa'];
    }

    // This is a vital function so we need it to load everything!
    if (!function_exists('multimedia_vital'))
        fatal_lang_error('You must 
        left the copyright in the template!',false);
}

The code from index.php (lines 171-175):

// What function shall we execute? (done like this for memory's sake.)
call_user_func(Shoutbox_Load(smf_main()));

// Call obExit specially; we're coming from the main area ;).
obExit(null, null, true);