[Krypto]

If your using the TT themes for HTracker will will receive that error you need to add <?=license();?> into your theme footer.php

or
remove the function fron backend/functions.php

function checker(){ 
GLOBAL $site_config, $THEME; 
$file = file_get_contents("themes/$THEME/footer.php");
if(!strpos($file, "license")) {
show_error_msg("Warning!", "Copyright removed or changed ");
}
}

Or remove the checker() from these files

admincp.php
backend/functions.php
download.php
search.php
torrents-today.php
torrents.php