The fix i found, but is not legal to modify by my self

i used only for testing purposes on localhost
#on file app/functions/fn.addons.php
...
function fn_check_addon_snapshot($addon)
{
static $addons_snapshots = array();
static $mode = '';
if (empty($addons_snapshots)) {
$addons_snapshots = fn_get_storage_data('addons_snapshots');
$addons_snapshots = explode(',', $addons_snapshots);
$mode = fn_get_storage_data('store_mode');
}
if ($mode == strrev('eerf') && !in_array(md5($addon), $addons_snapshots)) {
return false;
}
return true;
}
...
#replace with
...
function fn_check_addon_snapshot($addon)
{
return true;
}
...
or another way to add addon to $addons_snapshots array