diff --git a/web/push-notif/push-notifs-handler.js b/web/push-notif/push-notifs-handler.js
index e320bc913..f0235fffd 100644
--- a/web/push-notif/push-notifs-handler.js
+++ b/web/push-notif/push-notifs-handler.js
@@ -1,231 +1,231 @@
 // @flow
 
 import * as React from 'react';
 
 import {
   useSetDeviceTokenFanout,
   setDeviceTokenActionTypes,
 } from 'lib/actions/device-actions.js';
 import { useModalContext } from 'lib/components/modal-provider.react.js';
 import { isLoggedIn } from 'lib/selectors/user-selectors.js';
 import { useDispatchActionPromise } from 'lib/utils/action-utils.js';
 import { convertNonPendingIDToNewSchema } from 'lib/utils/migration-utils.js';
 import {
   shouldSkipPushPermissionAlert,
   recordNotifPermissionAlertActionType,
 } from 'lib/utils/push-alerts.js';
 import { useDispatch } from 'lib/utils/redux-utils.js';
 import { ashoatKeyserverID } from 'lib/utils/validation-utils.js';
 
 import { decryptDesktopNotification } from './notif-crypto-utils.js';
 import {
   WORKERS_MODULES_DIR_PATH,
   DEFAULT_OLM_FILENAME,
 } from '../database/utils/constants.js';
 import electron from '../electron.js';
 import PushNotifModal from '../modals/push-notif-modal.react.js';
 import { updateNavInfoActionType } from '../redux/action-types.js';
 import { useSelector } from '../redux/redux-utils.js';
 import { useStaffCanSee } from '../utils/staff-utils.js';
 
 declare var baseURL: string;
 declare var olmFilename: string;
 
 function useCreateDesktopPushSubscription() {
   const dispatchActionPromise = useDispatchActionPromise();
   const callSetDeviceToken = useSetDeviceTokenFanout();
   const staffCanSee = useStaffCanSee();
 
   React.useEffect(
     () =>
       electron?.onDeviceTokenRegistered?.((token: ?string) => {
         void dispatchActionPromise(
           setDeviceTokenActionTypes,
           callSetDeviceToken(token),
         );
       }),
     [callSetDeviceToken, dispatchActionPromise],
   );
 
   React.useEffect(() => {
     electron?.fetchDeviceToken?.();
   }, []);
 
   React.useEffect(
     () =>
       electron?.onEncryptedNotification?.(
         async ({ encryptedPayload }: { encryptedPayload: string }) => {
           const decryptedPayload = await decryptDesktopNotification(
             encryptedPayload,
             staffCanSee,
           );
           electron?.showDecryptedNotification(decryptedPayload);
         },
       ),
     [staffCanSee],
   );
 
   const dispatch = useDispatch();
 
   React.useEffect(
     () =>
       electron?.onNotificationClicked?.(
         ({ threadID }: { +threadID: string }) => {
           const convertedThreadID = convertNonPendingIDToNewSchema(
             threadID,
             ashoatKeyserverID,
           );
 
           const payload = {
             chatMode: 'view',
             activeChatThreadID: convertedThreadID,
             tab: 'chat',
           };
 
           dispatch({ type: updateNavInfoActionType, payload });
         },
       ),
     [dispatch],
   );
 }
 
 function useCreatePushSubscription(): () => Promise<void> {
   const publicKey = useSelector(state => state.pushApiPublicKey);
 
   const dispatchActionPromise = useDispatchActionPromise();
   const callSetDeviceToken = useSetDeviceTokenFanout();
   const staffCanSee = useStaffCanSee();
 
   return React.useCallback(async () => {
     if (!publicKey) {
       return;
     }
 
     const workerRegistration = await navigator.serviceWorker?.ready;
-    if (!workerRegistration) {
+    if (!workerRegistration || !workerRegistration.pushManager) {
       return;
     }
 
     const origin = window.location.origin;
     const olmWasmDirPath = `${origin}${baseURL}${WORKERS_MODULES_DIR_PATH}`;
     const olmWasmFilename = olmFilename ? olmFilename : DEFAULT_OLM_FILENAME;
     const olmWasmPath = `${olmWasmDirPath}/${olmWasmFilename}`;
     workerRegistration.active?.postMessage({ olmWasmPath, staffCanSee });
 
     const subscription = await workerRegistration.pushManager.subscribe({
       userVisibleOnly: true,
       applicationServerKey: publicKey,
     });
 
     void dispatchActionPromise(
       setDeviceTokenActionTypes,
       callSetDeviceToken(JSON.stringify(subscription)),
     );
   }, [callSetDeviceToken, dispatchActionPromise, publicKey, staffCanSee]);
 }
 
 function PushNotificationsHandler(): React.Node {
   useCreateDesktopPushSubscription();
   const createPushSubscription = useCreatePushSubscription();
 
   const notifPermissionAlertInfo = useSelector(
     state => state.notifPermissionAlertInfo,
   );
 
   const modalContext = useModalContext();
   const loggedIn = useSelector(isLoggedIn);
 
   const dispatch = useDispatch();
 
   const supported = 'Notification' in window && !electron;
 
   React.useEffect(() => {
     void (async () => {
       if (!navigator.serviceWorker || !supported) {
         return;
       }
 
       await navigator.serviceWorker.register('worker/notif', { scope: '/' });
 
       if (Notification.permission === 'granted') {
         // Make sure the subscription is current if we have the permissions
         await createPushSubscription();
       } else if (
         Notification.permission === 'default' &&
         loggedIn &&
         !shouldSkipPushPermissionAlert(notifPermissionAlertInfo)
       ) {
         // Ask existing users that are already logged in for permission
         modalContext.pushModal(<PushNotifModal />);
         dispatch({
           type: recordNotifPermissionAlertActionType,
           payload: { time: Date.now() },
         });
       }
     })();
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
   // Ask for permission on login
   const prevLoggedIn = React.useRef(loggedIn);
   React.useEffect(() => {
     if (!navigator.serviceWorker || !supported) {
       return;
     }
 
     if (!prevLoggedIn.current && loggedIn) {
       if (Notification.permission === 'granted') {
         void createPushSubscription();
       } else if (
         Notification.permission === 'default' &&
         !shouldSkipPushPermissionAlert(notifPermissionAlertInfo)
       ) {
         modalContext.pushModal(<PushNotifModal />);
         dispatch({
           type: recordNotifPermissionAlertActionType,
           payload: { time: Date.now() },
         });
       }
     }
     prevLoggedIn.current = loggedIn;
   }, [
     createPushSubscription,
     dispatch,
     loggedIn,
     modalContext,
     notifPermissionAlertInfo,
     prevLoggedIn,
     supported,
   ]);
 
   // Redirect to thread on notification click
   React.useEffect(() => {
     if (!navigator.serviceWorker || !supported) {
       return undefined;
     }
 
     const callback = (event: MessageEvent) => {
       if (typeof event.data !== 'object' || !event.data) {
         return;
       }
 
       if (event.data.targetThreadID) {
         const payload = {
           chatMode: 'view',
           activeChatThreadID: event.data.targetThreadID,
           tab: 'chat',
         };
 
         dispatch({ type: updateNavInfoActionType, payload });
       }
     };
 
     navigator.serviceWorker.addEventListener('message', callback);
     return () =>
       navigator.serviceWorker?.removeEventListener('message', callback);
   }, [dispatch, supported]);
 
   return null;
 }
 
 export { PushNotificationsHandler, useCreatePushSubscription };