Need To Fix a PHP SERVER ERROR

I am in need of a PHP expert to fix a server error that is preventing me from creating tournaments and other games on my website. The specific error message is currently unknown, but it is causing an internal server error. I am not sure if any recent changes have been made to the website or server configuration, but I do have access to the server and hosting provider to make necessary changes. Ideal candidates for this job should have experience in PHP and server troubleshooting, and be able to quickly identify and resolve the error.