diff --git a/src/editors/data/redux/app/selectors.js b/src/editors/data/redux/app/selectors.js
index 9976eee19f..d1c7ffd666 100644
--- a/src/editors/data/redux/app/selectors.js
+++ b/src/editors/data/redux/app/selectors.js
@@ -42,10 +42,9 @@ export const returnUrl = createSelector(
 
 export const isInitialized = createSelector(
   [
-    module.simpleSelectors.unitUrl,
     module.simpleSelectors.blockValue,
   ],
-  (unitUrl, blockValue) => !!(unitUrl && blockValue),
+  (blockValue) => !!(blockValue),
 );
 
 export const displayTitle = createSelector(
diff --git a/src/editors/data/redux/thunkActions/app.js b/src/editors/data/redux/thunkActions/app.js
index fa50c91a06..0bd1a070af 100644
--- a/src/editors/data/redux/thunkActions/app.js
+++ b/src/editors/data/redux/thunkActions/app.js
@@ -89,7 +89,9 @@ export const initialize = (data) => (dispatch) => {
   const editorType = data.blockType;
   dispatch(actions.app.initialize(data));
   dispatch(module.fetchBlock());
-  dispatch(module.fetchUnit());
+  if (data.blockId.startsWith('block-v1:')) {
+    dispatch(module.fetchUnit());
+  }
   switch (editorType) {
     case 'problem':
       dispatch(module.fetchImages({ pageNumber: 0 }));
@@ -100,7 +102,12 @@ export const initialize = (data) => (dispatch) => {
       dispatch(module.fetchCourseDetails());
       break;
     case 'html':
-      dispatch(module.fetchImages({ pageNumber: 0 }));
+      if (data.learningContextId.startsWith('lib:')) {
+        // eslint-disable-next-line no-console
+        console.log('Not fetching image assets - not implemented yet for content libraries.');
+      } else {
+        dispatch(module.fetchImages({ pageNumber: 0 }));
+      }
       break;
     default:
       break;
diff --git a/src/editors/data/services/cms/urls.js b/src/editors/data/services/cms/urls.js
index de4e9f158a..d101ff9241 100644
--- a/src/editors/data/services/cms/urls.js
+++ b/src/editors/data/services/cms/urls.js
@@ -38,11 +38,7 @@ export const blockAncestor = ({ studioEndpointUrl, blockId }) => {
   if (blockId.includes('block-v1')) {
     return `${block({ studioEndpointUrl, blockId })}?fields=ancestorInfo`;
   }
-  // this url only need to get info to build the return url, which isn't used by V2 blocks
-  // (temporary) don't throw error, just return empty url. it will fail it's network connection but otherwise
-  // the app will run
-  // throw new Error('Block ancestor not available (and not needed) for V2 blocks');
-  return '';
+  throw new Error('Block ancestor not available (and not needed) for V2 blocks');
 };
 
 export const blockStudioView = ({ studioEndpointUrl, blockId }) => (