diff --git a/Config/phpstan-baseline.neon b/Config/phpstan-baseline.neon
index 2b38b1f..7707bf4 100644
--- a/Config/phpstan-baseline.neon
+++ b/Config/phpstan-baseline.neon
@@ -425,6 +425,11 @@ parameters:
 			count: 1
 			path: Modules/DatabaseEditor/Models/Table.php
 
+		-
+			message: "#^Parameter \\#1 \\$media of static method Modules\\\\Draw\\\\Models\\\\DrawImage\\:\\:fromMedia\\(\\) expects Modules\\\\Media\\\\Models\\\\Media, Modules\\\\Media\\\\Models\\\\Media\\|null given\\.$#"
+			count: 1
+			path: Modules/Draw/Controller/ApiController.php
+
 		-
 			message: "#^Method Modules\\\\Draw\\\\Models\\\\DrawImage\\:\\:jsonSerialize\\(\\) has no return typehint specified\\.$#"
 			count: 1
@@ -605,6 +610,11 @@ parameters:
 			count: 6
 			path: Modules/HumanResourceManagement/Models/StaffList.php
 
+		-
+			message: "#^Method Modules\\\\HumanResourceManagement\\\\Models\\\\StaffList\\:\\:getList\\(\\) should return array but returns array\\<string, mixed\\>\\|null\\.$#"
+			count: 1
+			path: Modules/HumanResourceManagement/Models/StaffList.php
+
 		-
 			message: "#^Method Modules\\\\HumanResourceManagement\\\\Models\\\\StaffList\\:\\:getStats\\(\\) should return array but return statement is missing\\.$#"
 			count: 1
@@ -620,11 +630,21 @@ parameters:
 			count: 2
 			path: Modules/HumanResourceTimeRecording/Controller/ApiController.php
 
+		-
+			message: "#^Cannot call method getStatus\\(\\) on Modules\\\\HumanResourceTimeRecording\\\\Models\\\\SessionElement\\|null\\.$#"
+			count: 1
+			path: Modules/HumanResourceTimeRecording/Controller/ApiController.php
+
 		-
 			message: "#^Cannot call method getId\\(\\) on int\\|Modules\\\\HumanResourceTimeRecording\\\\Models\\\\Session\\.$#"
 			count: 1
 			path: Modules/HumanResourceTimeRecording/Controller/ApiController.php
 
+		-
+			message: "#^Cannot call method getSession\\(\\) on Modules\\\\HumanResourceTimeRecording\\\\Models\\\\SessionElement\\|null\\.$#"
+			count: 1
+			path: Modules/HumanResourceTimeRecording/Controller/ApiController.php
+
 		-
 			message: "#^Call to method getProfile\\(\\) on an unknown class Modules\\\\HumanResourceTimeRecording\\\\Models\\\\Employee\\.$#"
 			count: 2
@@ -880,6 +900,11 @@ parameters:
 			count: 1
 			path: Modules/Media/Models/Media.php
 
+		-
+			message: "#^Parameter \\#1 \\$known_string of function hash_equals expects string, string\\|null given\\.$#"
+			count: 1
+			path: Modules/Media/Models/Media.php
+
 		-
 			message: "#^Method Modules\\\\Media\\\\Models\\\\Media\\:\\:jsonSerialize\\(\\) has no return typehint specified\\.$#"
 			count: 1
@@ -1460,16 +1485,36 @@ parameters:
 			count: 1
 			path: Modules/TestModule/Controller/Controller.php
 
+		-
+			message: "#^Method Modules\\\\WarehouseManagement\\\\Models\\\\Arrival\\:\\:getDate\\(\\) should return DateTime but returns DateTime\\|null\\.$#"
+			count: 1
+			path: Modules/WarehouseManagement/Models/Arrival.php
+
+		-
+			message: "#^Method Modules\\\\WarehouseManagement\\\\Models\\\\Arrival\\:\\:getAcceptor\\(\\) should return int but returns int\\|null\\.$#"
+			count: 1
+			path: Modules/WarehouseManagement/Models/Arrival.php
+
 		-
 			message: "#^Property Modules\\\\WarehouseManagement\\\\Models\\\\Article\\:\\:\\$creator has unknown class phpOMS\\\\Models\\\\User as its type\\.$#"
 			count: 1
 			path: Modules/WarehouseManagement/Models/Article.php
 
+		-
+			message: "#^Method Modules\\\\WarehouseManagement\\\\Models\\\\Article\\:\\:getCreated\\(\\) should return DateTime but returns DateTime\\|null\\.$#"
+			count: 1
+			path: Modules/WarehouseManagement/Models/Article.php
+
 		-
 			message: "#^Return typehint of method Modules\\\\WarehouseManagement\\\\Models\\\\Article\\:\\:getCreator\\(\\) has invalid type phpOMS\\\\Models\\\\User\\.$#"
 			count: 1
 			path: Modules/WarehouseManagement/Models/Article.php
 
+		-
+			message: "#^Method Modules\\\\WarehouseManagement\\\\Models\\\\Article\\:\\:getCreator\\(\\) should return phpOMS\\\\Models\\\\User but returns phpOMS\\\\Models\\\\User\\|null\\.$#"
+			count: 1
+			path: Modules/WarehouseManagement/Models/Article.php
+
 		-
 			message: "#^Parameter \\$creator of method Modules\\\\WarehouseManagement\\\\Models\\\\Article\\:\\:setCreator\\(\\) has invalid typehint type phpOMS\\\\Models\\\\User\\.$#"
 			count: 1
@@ -1480,6 +1525,16 @@ parameters:
 			count: 3
 			path: Modules/WarehouseManagement/Models/Article.php
 
+		-
+			message: "#^Method Modules\\\\WarehouseManagement\\\\Models\\\\Shipping\\:\\:getDelivered\\(\\) should return DateTime but returns DateTime\\|null\\.$#"
+			count: 1
+			path: Modules/WarehouseManagement/Models/Shipping.php
+
+		-
+			message: "#^Method Modules\\\\WarehouseManagement\\\\Models\\\\Shipping\\:\\:getSender\\(\\) should return int but returns int\\|null\\.$#"
+			count: 1
+			path: Modules/WarehouseManagement/Models/Shipping.php
+
 		-
 			message: "#^Property Modules\\\\Workflow\\\\Templates\\\\Permission\\\\Workflow\\:\\:\\$id has no typehint specified\\.$#"
 			count: 1
@@ -1545,6 +1600,16 @@ parameters:
 			count: 1
 			path: phpOMS/Account/PermissionAbstract.php
 
+		-
+			message: "#^Offset 0 does not exist on array\\(int, int\\)\\|null\\.$#"
+			count: 6
+			path: phpOMS/Algorithm/Maze/MazeGenerator.php
+
+		-
+			message: "#^Offset 1 does not exist on array\\(int, int\\)\\|null\\.$#"
+			count: 5
+			path: phpOMS/Algorithm/Maze/MazeGenerator.php
+
 		-
 			message: "#^Method Model\\\\CoreSettings\\:\\:getOptions\\(\\) has no return typehint specified\\.$#"
 			count: 1
@@ -1770,6 +1835,11 @@ parameters:
 			count: 1
 			path: phpOMS/DataStorage/Database/Query/Builder.php
 
+		-
+			message: "#^Offset int does not exist on array\\|string\\|null\\.$#"
+			count: 1
+			path: phpOMS/DataStorage/Database/Query/Builder.php
+
 		-
 			message: "#^Instanceof between array and phpOMS\\\\DataStorage\\\\Database\\\\Query\\\\Builder will always evaluate to false\\.$#"
 			count: 1
@@ -1930,6 +2000,11 @@ parameters:
 			count: 1
 			path: phpOMS/Math/Stochastic/NaiveBayesClassifier.php
 
+		-
+			message: "#^Offset 'Content\\-Disposition' does not exist on array\\<string, array\\<int\\|string, mixed\\>\\>\\|null\\.$#"
+			count: 1
+			path: phpOMS/Message/Http/HttpRequest.php
+
 		-
 			message: "#^Method phpOMS\\\\Message\\\\Mail\\\\EmailAbstract\\:\\:decode\\(\\) should return string but returns string\\|false\\.$#"
 			count: 3
@@ -2520,6 +2595,11 @@ parameters:
 			count: 1
 			path: phpOMS/Utils/Converter/File.php
 
+		-
+			message: "#^Offset 0 does not exist on array\\<int, mixed\\>\\|null\\.$#"
+			count: 2
+			path: phpOMS/Utils/Encoding/Huffman/Dictionary.php
+
 		-
 			message: "#^Method phpOMS\\\\Utils\\\\IO\\\\Csv\\\\CsvInterface\\:\\:exportCsv\\(\\) has no return typehint specified\\.$#"
 			count: 1
@@ -2550,3 +2630,18 @@ parameters:
 			count: 1
 			path: phpOMS/Utils/Parser/Markdown/Markdown.php
 
+		-
+			message: "#^Parameter \\#3 \\$subject of function str_replace expects array\\|string, string\\|null given\\.$#"
+			count: 1
+			path: phpOMS/Utils/Parser/Markdown/Markdown.php
+
+		-
+			message: "#^Offset 0 does not exist on array\\|null\\.$#"
+			count: 1
+			path: phpOMS/Utils/RnG/Phone.php
+
+		-
+			message: "#^Offset 1 does not exist on array\\|null\\.$#"
+			count: 1
+			path: phpOMS/Utils/RnG/Phone.php
+
diff --git a/Helper/testreport.sh b/Helper/testreport.sh
index 2faabc2..cc06a4d 100644
--- a/Helper/testreport.sh
+++ b/Helper/testreport.sh
@@ -1,12 +1,12 @@
 #!/bin/bash
 
-mkdir Build/test
+mkdir -p Build/test
 
 php phpcs.phar ./ --standard="Build/Config/phpcs.xml"
-php phpstan.phar analyse --autoload-file=phpOMS/Autoloader.php -l 7 -c Build/Config/phpstan.neon ./
+php phpstan.phar analyse --autoload-file=phpOMS/Autoloader.php -l 8 -c Build/Config/phpstan.neon ./
 
 php phpcs.phar ./ --standard="Build/Config/phpcs.xml" -s --report-junit=Build/test/junit_phpcs.xml
-php phpstan.phar analyse --autoload-file=phpOMS/Autoloader.php -l 7 -c Build/Config/phpstan.neon --error-format=prettyJson ./ > Build/test/phpstan.json
+php phpstan.phar analyse --autoload-file=phpOMS/Autoloader.php -l 8 -c Build/Config/phpstan.neon --error-format=prettyJson ./ > Build/test/phpstan.json
 
 # Remove empty lines and lines with warnings which corrupt the json format
 sed -i '/^$/d' Build/test/phpstan.json
diff --git a/Hooks/tests.sh b/Hooks/tests.sh
index 51293f7..801149f 100755
--- a/Hooks/tests.sh
+++ b/Hooks/tests.sh
@@ -13,7 +13,7 @@ isPhanTestSuccessful() {
 }
 
 isPhpStanTestSuccessful() {
-    php -d memory_limit=4G ${rootpath}/vendor/bin/phpstan analyse --autoload-file=${rootpath}/phpOMS/Autoloader.php -l 7 -c ${rootpath}/Build/Config/phpstan.neon "$1" >&2
+    php -d memory_limit=4G ${rootpath}/vendor/bin/phpstan analyse --autoload-file=${rootpath}/phpOMS/Autoloader.php -l 8 -c ${rootpath}/Build/Config/phpstan.neon "$1" >&2
     if [ $? -ne 0 ]; then
         echo 0
         return 0
diff --git a/Inspection/Php/tests.sh b/Inspection/Php/tests.sh
index 926d8a9..2884beb 100755
--- a/Inspection/Php/tests.sh
+++ b/Inspection/Php/tests.sh
@@ -12,9 +12,9 @@ echo "#################################################"
 echo "Start php static inspection"
 echo "#################################################"
 
-php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 7 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/phpOMS > ${INSPECTION_PATH}/Framework/phpstan.log
-php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 7 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/Modules > ${INSPECTION_PATH}/Modules/phpstan.log
-php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 7 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/Model > ${INSPECTION_PATH}/Model/phpstan.log
-php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 7 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/Web > ${INSPECTION_PATH}/Web/phpstan.log
+php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 8 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/phpOMS > ${INSPECTION_PATH}/Framework/phpstan.log
+php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 8 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/Modules > ${INSPECTION_PATH}/Modules/phpstan.log
+php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 8 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/Model > ${INSPECTION_PATH}/Model/phpstan.log
+php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 8 -c ${BUILD_PATH}/Config/phpstan.neon ${ROOT_PATH}/Web > ${INSPECTION_PATH}/Web/phpstan.log
 
-php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 7 -c ${BUILD_PATH}/Config/phpstan.neon --error-format=json ${ROOT_PATH}/phpOMS > ${INSPECTION_PATH}/Test/Php/phpstan.json
+php -d memory_limit=4G ${TOOLS_PATH}/phpstan.phar analyse --autoload-file=${ROOT_PATH}/phpOMS/Autoloader.php -l 8 -c ${BUILD_PATH}/Config/phpstan.neon --error-format=json ${ROOT_PATH}/phpOMS > ${INSPECTION_PATH}/Test/Php/phpstan.json