When installing on a windows machine, I'm getting this error:

Warning: fopen(C:\Users\admin\Code\CES-Wordpress-Base\wp-content\plugins\CES-Client/CES-Client/CES-Client.php): failed to open stream: No such file or directory in C:\Users\admin\Code\CES-Wordpress-Base\wp-includes\functions.php on line 4835

This folder doesn't exist:
C:\Users\admin\Code\CES-Wordpress-Base\wp-content\plugins\CES-Client/CES-Client/

Plugin is installed at
C:\Users\admin\Code\CES-Wordpress-Base\wp-content\plugins\CES-Client/