I'm getting the 'sample *.ch1 wasn't found' error

There are two possible reasons why you’re getting this error:

Are the samples stored stored in a safe location?
To make sure, please, see this guide.

You might have not selected the correct sample folder location.
Please, see this guide for help.

This doesn’t apply to free plugins. If you’re trying to configure a free instrument, you don’t have choice as to where the samples are stored. Just run the installer and have fun.