Autoblock function isn't working anymore

I just installed the plugin on a WP 4.5 website and indeed the autoblock function isn’t working.

I made a small modification in file class-frontend.php of the plugin, lines 197-202:

function ecl_buffer_start() { ob_start(/*"ecl_callback"*/); }
function ecl_buffer_end() {
	$contents = ecl_erase(ob_get_contents());
	ob_end_clean();
	echo $contents;
}

Now it seems to be working.