not able to run the project. getting errors

[anujpuri72]

Can you update the readme so that one can understand how to run the project

[samyak619]

Fatal error: Uncaught mysqli_sql_exception: Unknown column 'customer_name' in 'field list' in C:\xampp\htdocs\gymgmt\func.php:55 Stack trace: #0 C:\xampp\htdocs\gymgmt\func.php(55): mysqli_query(Object(mysqli), 'insert into Pay...') #1 {main} thrown in C:\xampp\htdocs\gymgmt\func.php on line 55

how can i fix this error