diff --git a/components/ILIAS/Scorm2004/classes/adlparser/SeqTreeBuilder.php b/components/ILIAS/Scorm2004/classes/adlparser/SeqTreeBuilder.php
index bec008ab203e..c15d445002f7 100755
--- a/components/ILIAS/Scorm2004/classes/adlparser/SeqTreeBuilder.php
+++ b/components/ILIAS/Scorm2004/classes/adlparser/SeqTreeBuilder.php
@@ -46,6 +46,23 @@
     DAMAGES.
 */
 
+require_once("SeqActivity.php");
+
+require_once("SeqRule.php");
+require_once("SeqRuleset.php");
+
+require_once("SeqCondition.php");
+require_once("SeqConditionSet.php");
+
+require_once("SeqObjective.php");
+require_once("SeqObjectiveMap.php");
+
+require_once("SeqRollupRule.php");
+require_once("SeqRollupRuleset.php");
+
+require_once("ADLAuxiliaryResource.php");
+
+
 class SeqTreeBuilder
 {
     public function buildNodeSeqTree(string $file): array
diff --git a/components/ILIAS/Scorm2004/classes/ilSCORM13Package.php b/components/ILIAS/Scorm2004/classes/ilSCORM13Package.php
index 26c84e6d8328..e5cf0313bf34 100755
--- a/components/ILIAS/Scorm2004/classes/ilSCORM13Package.php
+++ b/components/ILIAS/Scorm2004/classes/ilSCORM13Package.php
@@ -25,13 +25,13 @@
 */
 class ilSCORM13Package
 {
-    public const DB_ENCODE_XSL = './components/ILIAS/Scorm2004/templates/xsl/op/op-scorm13.xsl';
-    public const CONVERT_XSL = './components/ILIAS/Scorm2004/templates/xsl/op/scorm12To2004.xsl';
-    public const DB_DECODE_XSL = './components/ILIAS/Scorm2004/templates/xsl/op/op-scorm13-revert.xsl';
-    public const VALIDATE_XSD = './vendor/ilias/Scorm2004/xsd/op/op-scorm13.xsd';
+    public const DB_ENCODE_XSL = '../components/ILIAS/Scorm2004/templates/xsl/op/op-scorm13.xsl';
+    public const CONVERT_XSL = '../components/ILIAS/Scorm2004/templates/xsl/op/scorm12To2004.xsl';
+    public const DB_DECODE_XSL = '../components/ILIAS/Scorm2004/templates/xsl/op/op-scorm13-revert.xsl';
+    public const VALIDATE_XSD = '../vendor/ilias/Scorm2004/xsd/op/op-scorm13.xsd';
 
-    public const WRAPPER_HTML = './components/ILIAS/Scorm2004/scripts/converter/GenericRunTimeWrapper1.0_aadlc/GenericRunTimeWrapper.htm';
-    public const WRAPPER_JS = './components/ILIAS/Scorm2004/scripts/converter/GenericRunTimeWrapper1.0_aadlc/SCOPlayerWrapper.js';
+    public const WRAPPER_HTML = '../components/ILIAS/Scorm2004/scripts/converter/GenericRunTimeWrapper1.0_aadlc/GenericRunTimeWrapper.htm';
+    public const WRAPPER_JS = '../components/ILIAS/Scorm2004/scripts/converter/GenericRunTimeWrapper1.0_aadlc/SCOPlayerWrapper.js';
 
 
     private string $packageFolder;