Site down - ## Class 'Piwik\Intl\Locale' not found

I have Matomo installed and all of sudden I got an error when trying to access the application:

Class ‘Piwik\Intl\Locale’ not found

how do I fix this?

I have made no changes on the system. It is on a shared web server hosted by IIS.


Is it possible that some Matomo files got deleted or corrupted?
This class should be defined in core/Intl/Locale.php.

Maybe replace this file (or all files) with the correct ones from the Matomo download (