yaml_parse(): end of stream reached without finding document 0

Hello everyone, today i have a problem with my minigame plugin, i'm not able to get rid of:
[Server thread/CRITICAL]: Could not execute task castlesiege\Tasks\SignUpdaterTask: yaml_parse(): end of stream reached without finding document 0
[19:59:01] [Server thread/CRITICAL]: ErrorException: "yaml_parse(): end of stream reached without finding document 0" (EXCEPTION) in "src/pocketmine/utils/Config" at line 155
====================================================================
code was normally working, i don't have any idea why happend this.

only part of cose where i use config:
/*
* Get game status.
*/
$status = T::AQUA . "[Partecipa]";
if ($config->get("started") != false)
{
$status = T::GOLD . "[In Gioco]";
}elseif ($players_count >= 30)
{
$status = T::RED . "[Pieno]";
}

 

This happens for me, when i try to read an empty YAML file.
The PMMP YAML API obviously does NOT support empty YAML files.
Use "pocketmine\utils\Config#save" when creating an empty config file, this will write strange characters into it, which doesn't affect you data and everything works fine.
Output of "pocketmine\utils\Config#save" for an new file:

Code:

--- []
...

 

Copy config into http://yamllint.com and click "Go", copy output you get from yamllint.com, paste it into your config.