Comprehensive guide for troubleshooting common setup issues with OneSignal Web Push Notifications on WordPress, including browser compatibility (Chrome, Firefox, Safari), plugin integration, and resolving CDN or caching conflicts.
https://example.com
is not the same as https://www.example.com
. Use one version consistently.Verify plugin is active and open developer tools
Right-click your site, click Inspect, and open the Console tab.
Check the console for OneSignal errors
Check subscription status in the browser
Find your OneSignal Subscription ID in the console.
Verify Subscription ID in OneSignal dashboard
Search your OneSignal dashboard for the Subscription ID.
Send a test push notification
Site URL mismatch error.
Duplicate OneSignal initialization error.
Service Worker file missing (403/404).
https://your-site.com/wp-content/plugins/onesignal-free-web-push-notifications/sdk_files/OneSignalSDKWorker.js
If not, see Common plugin support to fix CDN or caching issues.
onesignal-free-web-push-notifications
YOURSITEHERE
:
W3 Total Cache exclusion settings.
BunnyCDN exclusion example.
Breeze exclusion example.
Hummingbird Pro Asset Optimization.
iThemes PHP plugin setting.