Import Existing Site to another computer

I have a problem with Local and before I reload it I have zip file a site and tried importing it on to Local on another computer. When I try opening the Import I get the message Configuration Error - your wp-config.php file has an empty database table prefix, which is not supported. I have tried zipping twice but receive the the same message when I import file. What do I do?

A post was merged into an existing topic: Importing a site and config file not transferring