FireFox: KSC unistall task fails

[GLFI69]

I immediately apologize for having opened the same topic on the English forum but it is useless to have a forum in Italian where no one answers!

I created a removal task on the KSC for FireFox 84.01 x64 using the "Uninstall application from the application registry" option.

KSC suggests me the correct path: "C:\Program Files\Mozilla Firefox\uninstall\helper.exe" and i add the /S parameter to complete the task.

the task stops with the error: cannot find the specified file.

I checked the path and the executable file and everything is correct.
What could be the problem?

I have latest version of KSC, Net Agent and KES.

Thanks.