Questions?
macOS has many features that help protect your Mac and your personal information from malicious software, this error is caused when you try to open an application that is not from the Mac App Store or identified developers, and your system's security settings are configured to only allow apps from the App Store or identified developers.
Spotium build 2 is working and has been tested on macOS Sonoma 14.2
There are no charges at all associated with Spotium, however you may choose to donate here.
Spotium should not interfere with any functionality of Spotify. However if it may seem this is an issue, join the discord server for help.