diff --git a/app/Mage.php b/app/Mage.php
index 1570ce0b1fa..8a019d43a7a 100644
--- a/app/Mage.php
+++ b/app/Mage.php
@@ -42,6 +42,12 @@
 
 Varien_Autoload::register();
 
+/** AUTOLOADER PATCH **/
+if (file_exists($autoloaderPath = (getenv('COMPOSER_VENDOR_PATH') ?: BP . DS .  'vendor') . DS . 'autoload.php')) {
+    require $autoloaderPath;
+}
+/** AUTOLOADER PATCH **/
+
 /* Support additional includes, such as composer's vendor/autoload.php files */
 foreach (glob(BP . DS . 'app' . DS . 'etc' . DS . 'includes' . DS . '*.php') as $path) {
     include_once $path;
diff --git a/app/code/core/Mage/Captcha/Model/Zend.php b/app/code/core/Mage/Captcha/Model/Zend.php
index 1da978abf2d..c7142e783a6 100644
--- a/app/code/core/Mage/Captcha/Model/Zend.php
+++ b/app/code/core/Mage/Captcha/Model/Zend.php
@@ -64,7 +64,7 @@ class Mage_Captcha_Model_Zend extends Zend_Captcha_Image implements Mage_Captcha
     /**
      * Generated word
      *
-     * @var string|null
+     * @var string
      */
     protected $_word;
 
@@ -483,7 +483,7 @@ protected function _setWord($word)
     protected function _clearWord()
     {
         $this->getSession()->unsetData($this->_getFormIdKey(self::SESSION_WORD));
-        $this->_word = null;
+        $this->_word = '';
         return $this;
     }
 
diff --git a/app/code/core/Mage/Catalog/Helper/Image.php b/app/code/core/Mage/Catalog/Helper/Image.php
index fdc415257e2..abe8cbdb96d 100644
--- a/app/code/core/Mage/Catalog/Helper/Image.php
+++ b/app/code/core/Mage/Catalog/Helper/Image.php
@@ -564,6 +564,10 @@ protected function getImageFile()
      */
     protected function parseSize($string)
     {
+        if ($string === null) {
+            return false;
+        }
+
         $size = explode('x', strtolower($string));
         if (count($size) === 2) {
             return [
@@ -571,6 +575,7 @@ protected function parseSize($string)
                 'heigth' => ($size[1] > 0) ? $size[1] : null,
             ];
         }
+
         return false;
     }
 
diff --git a/app/code/core/Mage/Core/Controller/Varien/Action.php b/app/code/core/Mage/Core/Controller/Varien/Action.php
index e5a7629c935..464a75dbc57 100644
--- a/app/code/core/Mage/Core/Controller/Varien/Action.php
+++ b/app/code/core/Mage/Core/Controller/Varien/Action.php
@@ -994,7 +994,7 @@ protected function _filterDates($array, $dateFields)
         ]);
 
         foreach ($dateFields as $dateField) {
-            if (array_key_exists($dateField, $array) && !empty($dateField)) {
+            if ($dateField && !empty($array[$dateField])) {
                 $array[$dateField] = $filterInput->filter($array[$dateField]);
                 $array[$dateField] = $filterInternal->filter($array[$dateField]);
             }
diff --git a/app/code/core/Mage/Eav/Model/Adminhtml/System/Config/Source/Inputtype/Validator.php b/app/code/core/Mage/Eav/Model/Adminhtml/System/Config/Source/Inputtype/Validator.php
index 842d962c88c..55f5257bf79 100644
--- a/app/code/core/Mage/Eav/Model/Adminhtml/System/Config/Source/Inputtype/Validator.php
+++ b/app/code/core/Mage/Eav/Model/Adminhtml/System/Config/Source/Inputtype/Validator.php
@@ -22,7 +22,7 @@
 class Mage_Eav_Model_Adminhtml_System_Config_Source_Inputtype_Validator extends Zend_Validate_InArray
 {
     /**
-     * @var array<string, string>|null
+     * @inheritdoc
      */
     protected $_messageTemplates;
 
@@ -34,7 +34,7 @@ public function __construct()
         $haystack = $helper->getInputTypesValidatorData();
 
         //reset message template and set custom
-        $this->_messageTemplates = null;
+        $this->_messageTemplates = [];
         $this->_initMessageTemplates();
 
         //parent construct with options
diff --git a/app/code/core/Mage/Payment/Helper/Data.php b/app/code/core/Mage/Payment/Helper/Data.php
index d05dd380f52..5f6f6da6570 100644
--- a/app/code/core/Mage/Payment/Helper/Data.php
+++ b/app/code/core/Mage/Payment/Helper/Data.php
@@ -26,6 +26,18 @@ class Mage_Payment_Helper_Data extends Mage_Core_Helper_Abstract
 
     protected $_moduleName = 'Mage_Payment';
 
+    /**
+     * Retrieve the class name of the payment method's model
+     *
+     * @param $code
+     * @return string|null
+     */
+    public function getMethodModelClassName($code)
+    {
+        $key = self::XML_PATH_PAYMENT_METHODS . '/' . $code . '/model';
+        return Mage::getStoreConfig($key);
+    }
+
     /**
      * Retrieve method model object
      *
@@ -34,8 +46,7 @@ class Mage_Payment_Helper_Data extends Mage_Core_Helper_Abstract
      */
     public function getMethodInstance($code)
     {
-        $key = self::XML_PATH_PAYMENT_METHODS . '/' . $code . '/model';
-        $class = Mage::getStoreConfig($key);
+        $class = $this->getMethodModelClassName($code);
         if (is_null($class)) {
             Mage::logException(new Exception(sprintf('Unknown payment method with code "%s"', $code)));
             return false;
@@ -156,7 +167,13 @@ public function getRecurringProfileMethods($store = null)
     {
         $result = [];
         foreach ($this->getPaymentMethods($store) as $code => $data) {
-            $method = $this->getMethodInstance($code);
+            $paymentMethodModelClassName = $this->getMethodModelClassName($code);
+            if (!$paymentMethodModelClassName) {
+                continue;
+            }
+
+            /** @var Mage_Payment_Model_Method_Abstract $method */
+            $method = Mage::getModel($paymentMethodModelClassName);
             if ($method && $method->canManageRecurringProfiles()) {
                 $result[] = $method;
             }
@@ -207,8 +224,9 @@ public function getPaymentMethodList($sorted = true, $asLabelValue = false, $wit
             if ((isset($data['title']))) {
                 $methods[$code] = $data['title'];
             } else {
-                if ($this->getMethodInstance($code)) {
-                    $methods[$code] = $this->getMethodInstance($code)->getConfigData('title', $store);
+                $paymentMethodModelClassName = $this->getMethodModelClassName($code);
+                if ($paymentMethodModelClassName) {
+                    $methods[$code] = Mage::getModel($paymentMethodModelClassName)->getConfigData('title', $store);
                 }
             }
             if ($asLabelValue && $withGroups && isset($data['group'])) {
diff --git a/dev/openmage/docker-compose.yml b/dev/openmage/docker-compose.yml
index f12b1a44e7c..1ae91aaa292 100644
--- a/dev/openmage/docker-compose.yml
+++ b/dev/openmage/docker-compose.yml
@@ -10,7 +10,7 @@ services:
       - ../..:/var/www/html
     environment:
       - ENABLE_SENDMAIL=${ENABLE_SENDMAIL:-true}
-      - XDEBUG_CONFIG=${XDEBUG_CONFIG:-remote_connect_back=1 remote_enable=1 idekey=phpstorm}
+      - XDEBUG_CONFIG=${XDEBUG_CONFIG:-client_host=host.docker.internal mode=debug force_display_errors=1 start_with_request=yes}
       - MAGE_IS_DEVELOPER_MODE=${MAGE_IS_DEVELOPER_MODE:-1}
     links:
       - mysql
diff --git a/dev/phpstan/stubs/Zend_Captcha_Word.stub b/dev/phpstan/stubs/Zend_Captcha_Word.stub
deleted file mode 100644
index b1b60b63f70..00000000000
--- a/dev/phpstan/stubs/Zend_Captcha_Word.stub
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-abstract class Zend_Captcha_Word
-{
-    /**
-     * Generated word
-     *
-     * @var string|null
-     */
-    protected $_word;
-}
diff --git a/dev/phpstan/stubs/Zend_Validate_InArray.stub b/dev/phpstan/stubs/Zend_Validate_InArray.stub
deleted file mode 100644
index dcb28e0a281..00000000000
--- a/dev/phpstan/stubs/Zend_Validate_InArray.stub
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-class Zend_Validate_InArray
-{
-    /**
-     * @var array<string, string>|null
-     */
-    protected $_messageTemplates;
-}
diff --git a/phpstan.dist.neon b/phpstan.dist.neon
index 5bb1048fdfd..eb99f86b075 100644
--- a/phpstan.dist.neon
+++ b/phpstan.dist.neon
@@ -71,9 +71,6 @@ parameters:
 
         # Instantiated class not found
         - lib/Varien/Image/Adapter.php
-    stubFiles:
-        - dev/phpstan/stubs/Zend_Captcha_Word.stub
-        - dev/phpstan/stubs/Zend_Validate_InArray.stub
     level: 4
     checkFunctionNameCase: true
     checkInternalClassCaseSensitivity: true
diff --git a/skin/frontend/rwd/default/js/msrp_rwd.js b/skin/frontend/rwd/default/js/msrp_rwd.js
index fcaf20f9cc2..eaabb64c495 100644
--- a/skin/frontend/rwd/default/js/msrp_rwd.js
+++ b/skin/frontend/rwd/default/js/msrp_rwd.js
@@ -12,8 +12,8 @@
  */
 
 Catalog.Map.showHelp = Catalog.Map.showHelp.wrap(function (parent, event) {
-    var helpBox = $('map-popup');
-    var bodyNode = $$('body')[0];
+    var helpBox = document.getElementById('map-popup');
+    var bodyNode = document.getElementsByTagName('body')[0];
 
     // Resolve calculation bug in parent so we can actually use these classes...
     if (helpBox && this != Catalog.Map && Catalog.Map.active != this.link) {