diff --git a/wise-webapp/src/main/webapp/WEB-INF/wisemapping-servlet.xml b/wise-webapp/src/main/webapp/WEB-INF/wisemapping-servlet.xml
index 62da4794..13d7ef64 100644
--- a/wise-webapp/src/main/webapp/WEB-INF/wisemapping-servlet.xml
+++ b/wise-webapp/src/main/webapp/WEB-INF/wisemapping-servlet.xml
@@ -29,14 +29,13 @@
         <property name="exceptionMappings">
             <props>
                 <!-- Security exceptions are wrapped in this exceptions -->
-                <prop key="java.lang.reflect.UndeclaredThrowableException">securityError</prop>
+                <prop key="com.wisemapping.exceptions.AccessDeniedSecurityException">securityError</prop>
             </props>
         </property>
 
         <property name="statusCodes">
             <props>
-                <!-- Handle missing found pages. Avoid generation of errors -->
-                <prop key="securityError">200</prop>
+                <prop key="securityError">404</prop>
             </props>
         </property>
 
diff --git a/wise-webapp/src/main/webapp/css/error.css b/wise-webapp/src/main/webapp/css/error.css
index 34fe7a9f..4148f9b0 100644
--- a/wise-webapp/src/main/webapp/css/error.css
+++ b/wise-webapp/src/main/webapp/css/error.css
@@ -1,5 +1,3 @@
-@import "compatibility.css";
-
 div#errorContainer {
     font-family:Helvetica;
     display: flex;