Admin code with registration and login with paypal

i am having this error pleas help me:

Warning: require_once(C:\xampp\htdocs\projet-2020\login22dollars\Zip\core_files../projet-2020/login22dollars/Zip/core_files/system/core/CodeIgniter.php): failed to open stream: No such file or directory in C:\xampp\htdocs\projet-2020\login22dollars\Zip\core_files\index.php on line 315

Fatal error: require_once(): Failed opening required 'C:\xampp\htdocs\projet-2020\login22dollars\Zip\core_files../projet-2020/login22dollars/Zip/core_files/system/core/CodeIgniter.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\projet-2020\login22dollars\Zip\core_files\index.php on line 315i am having this error