According to Logitech’s support page, the problem was caused by “an expired certificate” required for the apps to run.

Logitech has released a manual fix for Logi Options Plus and G Hub users on macOS after an expired certificate caused both apps and their built-in updaters to stop working.

Company says it dropped the ball, apologizes for wasting people's time Logitech says an expired developer certificate is to ...

If you’re a Mac user who has recently discovered their Logitech mouse or keyboard is not working suddenly, or not working ...

An expired security certificate breaks the Logi Options+ and G Hub apps on macOS, leaving many Logitech mouse and keyboard ...

Macworld If you’ve been having issues with your Logitech mouse on your Mac, it’s not you, it’s them. Logitech has issued a ...