diff --git a/src/lib/tw-local-backpack-api.js b/src/lib/tw-local-backpack-api.js
index e265cdf6a1c..3e3224870c2 100644
--- a/src/lib/tw-local-backpack-api.js
+++ b/src/lib/tw-local-backpack-api.js
@@ -68,21 +68,21 @@ const openDB = () => new Promise((resolve, reject) => {
 
     const request = indexedDB.open(DATABASE_NAME, DATABASE_VERSION);
 
-    request.onupgradeneeded = e => {
-        const db = e.target.result;
+    request.onupgradeneeded = event => {
+        const db = event.target.result;
         db.createObjectStore(STORE_NAME, {
             keyPath: 'id',
             autoIncrement: true
         });
     };
 
-    request.onsuccess = e => {
-        _db = e.target.result;
+    request.onsuccess = event => {
+        _db = event.target.result;
         resolve(_db);
     };
 
-    request.onerror = () => {
-        reject(new Error(`DB error: ${request.error}`));
+    request.onerror = event => {
+        reject(new Error(`DB error: ${event.target.error}`));
     };
 });
 
@@ -93,8 +93,8 @@ const getBackpackContents = async ({
     const db = await openDB();
     return new Promise((resolve, reject) => {
         const transaction = db.transaction(STORE_NAME, 'readonly');
-        transaction.onerror = () => {
-            reject(new Error(`Transaction error: ${transaction.error}`));
+        transaction.onerror = event => {
+            reject(new Error(`Transaction error: ${event.target.error}`));
         };
         const store = transaction.objectStore(STORE_NAME);
         const items = [];
@@ -132,8 +132,8 @@ const saveBackpackObject = async ({
     const db = await openDB();
     return new Promise((resolve, reject) => {
         const transaction = db.transaction(STORE_NAME, 'readwrite');
-        transaction.onerror = () => {
-            reject(new Error(`Transaction error: ${transaction.error}`));
+        transaction.onerror = event => {
+            reject(new Error(`Transaction error: ${event.target.error}`));
         };
         const store = transaction.objectStore(STORE_NAME);
         const bodyData = base64ToArrayBuffer(body);
@@ -161,8 +161,8 @@ const deleteBackpackObject = async ({
     const db = await openDB();
     return new Promise((resolve, reject) => {
         const transaction = db.transaction(STORE_NAME, 'readwrite');
-        transaction.onerror = () => {
-            reject(new Error(`Transaction error: ${transaction.error}`));
+        transaction.onerror = event => {
+            reject(new Error(`Transaction error: ${event.target.error}`));
         };
         const store = transaction.objectStore(STORE_NAME);
         // Convert string IDs to number IDs
@@ -181,8 +181,8 @@ const updateBackpackObject = async ({
     const db = await openDB();
     return new Promise((resolve, reject) => {
         const transaction = db.transaction(STORE_NAME, 'readwrite');
-        transaction.onerror = () => {
-            reject(new Error(`Transaction error: ${transaction.error}`));
+        transaction.onerror = event => {
+            reject(new Error(`Transaction error: ${event.target.error}`));
         };
         const store = transaction.objectStore(STORE_NAME);
         const getRequest = store.get(id);
diff --git a/src/lib/tw-restore-point-api.js b/src/lib/tw-restore-point-api.js
index 7bb96795ed0..6b0e1d4040d 100644
--- a/src/lib/tw-restore-point-api.js
+++ b/src/lib/tw-restore-point-api.js
@@ -160,8 +160,8 @@ const removeExtraneousData = transaction => new Promise(resolve => {
  */
 const removeExtraneousRestorePoints = () => openDB().then(db => new Promise((resolveTransaction, rejectTransaction) => {
     const transaction = db.transaction(ALL_STORES, 'readwrite');
-    transaction.onerror = () => {
-        rejectTransaction(new Error(`Transaction error: ${transaction.error}`));
+    transaction.onerror = event => {
+        rejectTransaction(new Error(`Transaction error: ${event.target.error}`));
     };
 
     // Figuring out which restore points to keep and which to remove is non-trivial.
@@ -310,8 +310,8 @@ const createRestorePoint = (
 
     generateThumbnail(vm).then(thumbnailData => {
         const transaction = db.transaction(ALL_STORES, 'readwrite');
-        transaction.onerror = () => {
-            rejectTransaction(new Error(`Transaction error: ${transaction.error}`));
+        transaction.onerror = event => {
+            rejectTransaction(new Error(`Transaction error: ${event.target.error}`));
         };
 
         // Will be generated by database
@@ -397,8 +397,8 @@ const createRestorePoint = (
  */
 const deleteRestorePoint = id => openDB().then(db => new Promise((resolve, reject) => {
     const transaction = db.transaction(ALL_STORES, 'readwrite');
-    transaction.onerror = () => {
-        reject(new Error(`Transaction error: ${transaction.error}`));
+    transaction.onerror = event => {
+        reject(new Error(`Transaction error: ${event.target.error}`));
     };
 
     const metadataStore = transaction.objectStore(METADATA_STORE);
@@ -414,8 +414,8 @@ const deleteRestorePoint = id => openDB().then(db => new Promise((resolve, rejec
  */
 const deleteAllRestorePoints = () => openDB().then(db => new Promise((resolveTransaction, rejectTransaction) => {
     const transaction = db.transaction(ALL_STORES, 'readwrite');
-    transaction.onerror = () => {
-        rejectTransaction(new Error(`Transaction error: ${transaction.error}`));
+    transaction.onerror = event => {
+        rejectTransaction(new Error(`Transaction error: ${event.target.error}`));
     };
 
     const deleteEverything = async () => {
@@ -448,8 +448,8 @@ const loadRestorePoint = (vm, id) => openDB().then(db => new Promise((resolvePro
     const storageHelper = {
         load: (assetType, assetId, dataFormat) => new Promise((resolveFetch, rejectFetch) => {
             const transaction = db.transaction([ASSET_STORE], 'readonly');
-            transaction.onerror = () => {
-                rejectFetch(new Error(`Transaction error: ${transaction.error}`));
+            transaction.onerror = event => {
+                rejectFetch(new Error(`Transaction error: ${event.target.error}`));
             };
 
             const md5ext = `${assetId}.${dataFormat}`;
@@ -474,8 +474,8 @@ const loadRestorePoint = (vm, id) => openDB().then(db => new Promise((resolvePro
 
     const loadProjectJSON = () => {
         const transaction = db.transaction([PROJECT_STORE], 'readonly');
-        transaction.onerror = () => {
-            rejectProject(new Error(`Transaction error: ${transaction.error}`));
+        transaction.onerror = event => {
+            rejectProject(new Error(`Transaction error: ${event.target.error}`));
         };
     
         const projectStore = transaction.objectStore(PROJECT_STORE);
@@ -508,8 +508,8 @@ const loadRestorePoint = (vm, id) => openDB().then(db => new Promise((resolvePro
  */
 const getAllRestorePoints = () => openDB().then(db => new Promise((resolve, reject) => {
     const transaction = db.transaction([METADATA_STORE], 'readonly');
-    transaction.onerror = () => {
-        reject(new Error(`Transaction error: ${transaction.error}`));
+    transaction.onerror = event => {
+        reject(new Error(`Transaction error: ${event.target.error}`));
     };
 
     /** @type {Metadata[]} */
@@ -552,8 +552,8 @@ const getAllRestorePoints = () => openDB().then(db => new Promise((resolve, reje
  */
 const getThumbnail = id => openDB().then(db => new Promise((resolve, reject) => {
     const transaction = db.transaction([THUMBNAIL_STORE], 'readonly');
-    transaction.onerror = () => {
-        reject(new Error(`Transaction error: ${transaction.error}`));
+    transaction.onerror = event => {
+        reject(new Error(`Transaction error: ${event.target.error}`));
     };
 
     const thumbnailStore = transaction.objectStore(THUMBNAIL_STORE);