Thank you for your help. I just got notice of your reply on my phone, so I guess it works. I usually turn off the speakers on my laptop unless sound is needed. I guess I should keep the sound on. Thank you again.
You can set up the Upwork Freelancer's App notification settings, by going to your account's Settings > Notification settings and adjust it to your needs. You can also go to your app's Settings, making sure that the app icon badges, and notifications are set up accordingly.