diff --git a/.github/workflows/e2e-tests.yml b/.github/workflows/e2e-tests.yml
index eea9090ba0..8b1e40cdbb 100644
--- a/.github/workflows/e2e-tests.yml
+++ b/.github/workflows/e2e-tests.yml
@@ -108,6 +108,11 @@ jobs:
         FORCE_COLOR: 1
       run: yarn ${PATTERN} e2e-tests/${GROUP}
 
+    - name: Print error log
+      if: always()
+      continue-on-error: true
+      run: docker compose exec ec-cube tail -n 100 data/logs/error.log
+
     - name: Upload evidence
       if: failure()
       uses: actions/upload-artifact@v4
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 09a8bcea83..ce77157935 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -80,6 +80,11 @@ jobs:
     - name: Run to PHPUnit SessionFactory
       run: docker compose exec -T ec-cube php data/vendor/bin/phpunit tests/class/SC_SessionFactoryTest.php
 
+    - name: Print error log
+      if: always()
+      continue-on-error: true
+      run: docker compose exec ec-cube tail -n 100 data/logs/error.log
+
     - name: Upload logs
       if: failure()
       uses: actions/upload-artifact@v4
diff --git a/data/class/SC_View.php b/data/class/SC_View.php
index bab1244bc6..27cc188dd6 100644
--- a/data/class/SC_View.php
+++ b/data/class/SC_View.php
@@ -40,7 +40,6 @@ public function __construct()
 
     public function init()
     {
-        // include_phpの利用のためSmartyBCを呼び出す、ホントはinclude_phpをなくしたいそうすれば、blank.tplもなくせる
         $this->_smarty = new \Smarty\Smarty();
         $this->_smarty->setLeftDelimiter('<!--{');
         $this->_smarty->setRightDelimiter('}-->');
@@ -74,6 +73,7 @@ public function init()
         $this->_smarty->registerPlugin('function', 'sfIsHTTPS', ['SC_Utils_Ex', 'sfIsHTTPS']);
         $this->_smarty->registerPlugin('function', 'sfSetErrorStyle', ['SC_Utils_Ex', 'sfSetErrorStyle']);
         $this->_smarty->registerPlugin('function', 'printXMLDeclaration', ['GC_Utils_Ex', 'printXMLDeclaration']);
+        $this->_smarty->muteUndefinedOrNullWarnings();
         $this->_smarty->default_modifiers = ['script_escape'];
 
         if (ADMIN_MODE == '1') {