What role does the server.cfg file play in resolving a FiveM 502 error?

The `server.cfg` file is crucial. Ensure all resource names are correctly spelled and listed. Incorrect resource names or syntax errors in this file can prevent resources from starting properly, leading to a 502 error. Also, verify that the `sv_maxclients` value isn't set too high for your server's hardware, as exceeding this limit can cause overload and 502 errors.