diff --git a/system/functions.php b/system/functions.php
index 8f41dad9..5c188804 100644
--- a/system/functions.php
+++ b/system/functions.php
@@ -201,7 +201,7 @@ function getFlagImage($country): string
  * @param mixed $v Variable to check.
  * @return bool Value boolean status.
  */
-function getBoolean($v): bool
+function getBoolean(mixed $v): bool
 {
 	if(is_bool($v)) {
 		return $v;
@@ -210,6 +210,10 @@ function getBoolean($v): bool
 	if(is_numeric($v))
 		return (int)$v > 0;
 
+	if (is_null($v)) {
+		return false;
+	}
+
 	$v = strtolower($v);
 	return $v === 'yes' || $v === 'true';
 }
diff --git a/system/libs/pot/OTS_Monster.php b/system/libs/pot/OTS_Monster.php
index 244a0229..19482dce 100644
--- a/system/libs/pot/OTS_Monster.php
+++ b/system/libs/pot/OTS_Monster.php
@@ -41,9 +41,10 @@
 class OTS_Monster extends DOMDocument
 {
 	private $loaded = false;
-	public function loadXML($source , $options = 0)
+	public function loadXML(string $source , int $options = 0): bool
 	{
 		$this->loaded = parent::loadXML($source, $options);
+		return $this->loaded;
 	}
 
 	public function loaded()