diff --git a/src/main/java/org/ohdsi/webapi/util/GenericExceptionMapper.java b/src/main/java/org/ohdsi/webapi/util/GenericExceptionMapper.java
index d53a2002f3..3784d67cb5 100644
--- a/src/main/java/org/ohdsi/webapi/util/GenericExceptionMapper.java
+++ b/src/main/java/org/ohdsi/webapi/util/GenericExceptionMapper.java
@@ -24,6 +24,7 @@
 import org.springframework.messaging.support.ErrorMessage;
 
 import javax.ws.rs.BadRequestException;
+import javax.ws.rs.ForbiddenException;
 import javax.ws.rs.NotFoundException;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
@@ -57,7 +58,7 @@ public Response toResponse(Throwable ex) {
             String cause = ex.getCause().getCause().getMessage();
             cause = cause.substring(cause.indexOf(DETAIL) + DETAIL.length());
             ex = new RuntimeException(cause);
-        } else if (ex instanceof UnauthorizedException) {
+        } else if (ex instanceof UnauthorizedException || ex instanceof ForbiddenException) {
             responseStatus = Status.FORBIDDEN;
         } else if (ex instanceof NotFoundException) {
             responseStatus = Status.NOT_FOUND;
diff --git a/src/main/resources/i18n/messages_en.json b/src/main/resources/i18n/messages_en.json
index 7a3c216599..2dc1a78830 100644
--- a/src/main/resources/i18n/messages_en.json
+++ b/src/main/resources/i18n/messages_en.json
@@ -398,7 +398,9 @@
       "overwriteConfirm": "Are you sure you want to overwrite current Concept Set Expression?",
       "loadingIncludedConcepts": "Loading Included Concepts",
       "commonAncestors": "Common Ancestors",
-      "loadingIncludedSourcecodes": "Loading Included Sourcecodes"
+      "loadingIncludedSourcecodes": "Loading Included Sourcecodes",
+      "expressionResolveError": "Error occurred during resolving expression!",
+      "forbiddenError": "You are not authorized to view the concept set expression."
     },
     "conceptLegend": {
       "standard": "Standard",
diff --git a/src/main/resources/i18n/messages_ko.json b/src/main/resources/i18n/messages_ko.json
index 3d6f40f956..295cc557b8 100644
--- a/src/main/resources/i18n/messages_ko.json
+++ b/src/main/resources/i18n/messages_ko.json
@@ -349,7 +349,9 @@
       "overwriteConfirm": "현재의 컨셉 세트 표현을 정말 덮어씌우시겠습니까?",
       "loadingIncludedConcepts": "포함된 컨셉 로딩 중",
       "commonAncestors": "공통 상위 컨셉",
-      "loadingIncludedSourcecodes": "포함된 소스 코드 로딩 중"
+      "loadingIncludedSourcecodes": "포함된 소스 코드 로딩 중",
+      "expressionResolveError": "Error occurred during resolving expression!",
+      "forbiddenError": "You are not authorized to view the concept set expression."
     },
     "conceptLegend": {
       "standard": "표준",
diff --git a/src/main/resources/i18n/messages_ru.json b/src/main/resources/i18n/messages_ru.json
index 753df0bb82..1c4ef5b204 100644
--- a/src/main/resources/i18n/messages_ru.json
+++ b/src/main/resources/i18n/messages_ru.json
@@ -911,7 +911,9 @@
       "overwriteConfirm": "Вы действительно хотите перезаписать текущее выражение набора концепций?",
       "loadingIncludedConcepts": "Загрузка включенных концепций",
       "commonAncestors": "Общие предки",
-      "loadingIncludedSourcecodes": "Загрузка включенных исходных кодов"
+      "loadingIncludedSourcecodes": "Загрузка включенных исходных кодов",
+      "expressionResolveError": "Ошибка загрузки выражения набора концепций!",
+      "forbiddenError": "Недостаточно прав для работы с выражением набора концепций."
     },
     "conceptLegend": {
       "standard": "Стандартный",
diff --git a/src/main/resources/i18n/messages_zh.json b/src/main/resources/i18n/messages_zh.json
index e726f0cd38..f0b05608d4 100644
--- a/src/main/resources/i18n/messages_zh.json
+++ b/src/main/resources/i18n/messages_zh.json
@@ -398,7 +398,9 @@
       "overwriteConfirm": "您确定要覆盖当前的概念集表达式吗？",
       "loadingIncludedConcepts": "加载包含的概念",
       "commonAncestors": "共同祖先",
-      "loadingIncludedSourcecodes": "加载包含的源代码"
+      "loadingIncludedSourcecodes": "加载包含的源代码",
+      "expressionResolveError": "Error occurred during resolving expression!",
+      "forbiddenError": "You are not authorized to view the concept set expression."
     },
     "conceptLegend": {
       "standard": "标准",