$post_max_size_possible = OCP\Util::computerFileSize(get_cfg_var('post_max_size'));
$maxUploadFilesize = OCP\Util::humanFileSize(min($upload_max_filesize, $post_max_size));
$maxUploadFilesizePossible = OCP\Util::humanFileSize(min($upload_max_filesize_possible, $post_max_size_possible));
-if($_POST && OC_Util::isCallRegistered) {
+if($_POST && OC_Util::isCallRegistered()) {
if(isset($_POST['maxUploadSize'])) {
if(($setMaxSize = OC_Files::setUploadLimit(OCP\Util::computerFileSize($_POST['maxUploadSize']))) !== false) {
$maxUploadFilesize = OCP\Util::humanFileSize($setMaxSize);