diff --git a/frontend/src/store/api-helper.js b/frontend/src/store/api-helper.js
index 2b65492c55..19b0af36a2 100644
--- a/frontend/src/store/api-helper.js
+++ b/frontend/src/store/api-helper.js
@@ -62,7 +62,7 @@ export function throwIfNotSuccess(response) {
                     let error = new Error(errorMsg);
                     error.statusCode = response.status;
                     reject(error);
-                });
+                }).catch(() => reject(new Error(defaultErrorMessage)))
             });
         } else {
             return Promise.reject(new ServiceError(response.status));
diff --git a/frontend/src/store/error/index.js b/frontend/src/store/error/index.js
index aaecb20201..e5699876bc 100644
--- a/frontend/src/store/error/index.js
+++ b/frontend/src/store/error/index.js
@@ -15,6 +15,8 @@ import { ERROR_ADD_CONTEXT_FIELD, ERROR_UPDATE_CONTEXT_FIELD } from '../context/
 
 import { ERROR_REMOVING_PROJECT, ERROR_ADD_PROJECT, ERROR_UPDATE_PROJECT } from '../project/actions';
 
+import { ERROR_ADD_ADDON_CONFIG, ERROR_UPDATE_ADDON_CONFIG, ERROR_REMOVING_ADDON_CONFIG } from '../addons/actions'
+
 import { UPDATE_APPLICATION_FIELD } from '../application/actions';
 
 import { FORBIDDEN } from '../util';
@@ -48,7 +50,11 @@ const strategies = (state = getInitState(), action) => {
         case ERROR_UPDATE_CONTEXT_FIELD:
         case ERROR_REMOVING_PROJECT:
         case ERROR_UPDATE_PROJECT:
+        case ERROR_ADD_ADDON_CONFIG:
+        case ERROR_UPDATE_ADDON_CONFIG:
+        case ERROR_REMOVING_ADDON_CONFIG:
         case ERROR_ADD_PROJECT:
+            console.log(action);
             return addErrorIfNotAlreadyInList(state, action.error.message);
         case FORBIDDEN:
             return addErrorIfNotAlreadyInList(state, action.error.message || '403 Forbidden');