Warning: Undefined variable $file in C:\xampp\htdocs\e-tender\process.php on line 230

Fatal error: Uncaught ValueError: Path cannot be empty in C:\xampp\htdocs\e-tender\process.php:233 Stack trace: #0 C:\xampp\htdocs\e-tender\process.php(233): readfile('') #1 {main} thrown in C:\xampp\htdocs\e-tender\process.php on line 233