If you don't receive Web Push notifications, after checking your operating system and browser settings, confirm that you have enabled opt-in settings. Then continue troubleshooting in the Web Push Settings.
Ensure that your website address is accurate on both the Inone and Web Push Settings pages. If not, the user will not receive your push notification.
Check Web Push Settings
For Web Push Settings, click the Setup Settings tab to ensure your URL is correct. 
Check Inone Settings
In Inone settings, click your username, then navigate to Settings > Inone Settings > Account Settings. Verify that your URL is correct in the Web & Social section.
Ensure that your website's address is correct in both areas. If not, get in touch with the Insider One team.