error 500

What does this mean?
happens on here when I click submit to adopt a hewan
https://www.hewan.org/forum/adopt.php

Error 500 :(

An error occurred.

If the problem persists, probably the application you use does not work correctly, because someone is working on it, or because there is a problem in the application. In the latter case contact us.

Go back

[alemoppo]

I can see the URL correctly:


Is the error persists?

Bye!

I can see the URL correctly:


Is the error persists?

Bye!

See, the error is here when you submit to adopt a hewan pet.

[alemoppo]

I can't reproduce the error:



Did you check the PHP code of this action?

Bye!