Why doesn't the sample form run?

Question

PHP

I'm using the MAMP server, all other files run fine, but this one doesn't want to.
Only apache server is installed, there is no micicle server
Yes, there is a sql file, I understand that another server is needed, but it doesn’t start at all, it’s somehow strange

Answer 1

500 error - general notification of a fatal error when error output is disabled in the server settings. You can see the error in the logs, or, in your case, it is preferable not to go into the logs every time to enable error output. How to do this - Ivan gave a link in the comments.