Clutch went bad with no warning?

This vehicle has a cable operated clutch so I suspect the cable broke or is stretched.

https://www.2carpros.com/articles/throw-out-bearing-replacement

You are correct that it normally starts slipping and gives you signs but there is an issue with the cable it can be instant.

What I would do is just inspect the cable and make sure it is connected and operating the throw out bearing correctly.

I attached the process below from the manual on this so let's run through this and see what turns up.

Thanks