Kacars error

[Maksim]

Hello, I downloaded kACARS_Free.php module, droped that file to the core/modules/kACARS_Free, but when I try to login in Kacars I have this error: https://imgur.com/a/c5dLd

site name: http://balticvagroup.eu/smartlynxvirtual

Help me please, thank you!

[Maksim]

Solved by adding 

<?php
echo file_get_contents('php://input');
?>
<form action="#" method="post">
  <input type="text" name="textOne" value="Foo"/>
  <input type="text" name="textTwo" value="Bar"/>
  <input type="submit" value="Submit"/>
</form>

at the top of the php.ini