'Enable Finder Extension', but there is none to enable (Mountain Duck)

[galvaniccoffee]

Describe the bug
When connecting to a server on macOS with Mountain Duck, I get the 'Enable Finder Extension' error message. When I click 'Open System Preferences', it opens the File Providers extensions menu in System Settings, where Mountain Duck is already enabled. If I open the Finder extensions menu, there is no Mountain Duck item I could enable.
This issue persists across reboots, and toggling the File Provider extension off and back on has no effect.

I'm not sure what the issue here is: does Mountain Duck actually mean the File Provider extension (maybe it was named differently in earlier versions of macOS?) and not recognize that it's already on, or should there be an additional Finder extension that's missing for some reason?

To Reproduce
Steps to reproduce the behavior, in my case:

1. Install Mountain Duck on a Mac (via homebrew, fresh install (since I never used Mountain Duck before))
2. Connect to an FTP-SSL server (have not tested it with a different one)
3. See error message.

Screenshots

Desktop:

• OS: macOS 15.2
• Mountain Duck Version 4.17.1 (22545)

[dkocher]

It is a bug that the prompt is sometimes displayed regardless of the extension already enabled in System Settings. The categorization of the extension in System Settings by macOS is incorrect (introduced in macOS 15.2+). Technically the extension i s a Finder Sync Extension different from a File Provider.