Copy of existing/working site will not run

Hello
I have a mysql site on my remote server with the original files on my local machine both are working correctly.

I need to make a few pages responsive so I planned to download the working site to my local machine under a different file name to practise!

When I copiedthe files to the new local site I get an error "Dynamically related files could not be resolved because the site definition is not correct for this server".

When I look at the definitions they seem to be correct.

I then decided to try another method and copied the files from my local working site htdocs to another folder in htdocs. I get the same error.

I can see the database connection is not working and if i try to edit this and select the database no database is listed.

I wondered if you can throw any light on what may be going wrong please?

I am attaching an image which may throw some light on the sibject

Many thanks

John