SoundSport Free wireless: Bose Updater Doesn't Work Anymore

I don't know when the Bose Updater stopped working, but now I get this message.

How can I fix the issue?

What is the latest firmware version?

Screen Shot 2019-10-03 at 12.27.32 PM.jpg

My system is

macOS Mojave: 10.14.6

Safari: 13.0.1

Current SoundSport Free firmware: 2.6.0

Bose Updater: 5.5.0