POST and GET not Working in Controllers

[humolot]

Interesting I know project but when doing GET or POST does not work

A PHP Error was encountered

<p>Severity: 8192</p>
<p>Message: chr(): Passing null to parameter #1 ($codepoint) of type int is deprecated</p>
<p>Filename: MX/Router.php</p>
<p>Line Number: 240</p>