Broken

I solved it by editing the file /wp-content/plugins/wp-filebase/wp-filebase.php (accessing it via FTP) and changing the original line 33:

if(func_num_args() > 1)
	return array_map(__FUNCTION__, func_get_args());

by the following:

if(func_num_args() > 1) {
	$arg_list = func_get_args();
	return array_map(__FUNCTION__, $arg_list);
	}

That worked for me.

Amets, then try uploading the old version of the plugin from the backup, that should work too without tinkering with the code.

If you don’t have a backup or a copy of the older version of the plugin, you can always comment the code in the file, or even delete the wp-filebase plugin folder to recover your site. Good luck.