Step 4 Fatal Error

Copying existing site to LOCALHOST. All steps OK until Step 4, which requires “Admin Login” to be clicked. This results in

Warning: require(/usr/share/php/wp-stack-cache.php): failed to open stream: No such file or directory in C:\xampp\htdocs\ashbourne\wp-content\mu-plugins\wp-stack-cache.php on line 21
Fatal error: require(): Failed opening required ‘/usr/share/php/wp-stack-cache.php’ (include_path=’C:\xampp\php\PEAR’) in C:\xampp\htdocs\ashbourne\wp-content\mu-plugins\wp-stack-cache.php on line 21

As a newbie to WordPress is there a SIMPLE solution?!