Warning: require(vendor/autoload.php): Failed to open stream: No such file or directory in C:\xampp\htdocs\bot\test\bot — копия.php on line 4

Fatal error: Uncaught Error: Failed opening required 'vendor/autoload.php' (include_path='C:\xampp\htdocs\bot\test') in C:\xampp\htdocs\bot\test\bot — копия.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\bot\test\bot — копия.php on line 4