What is a 500 internal server error?

A 500 internal server error indicates a non-specific problem with a website's server and is usually beyond a user's control.
The Independent

‘500 internal server error’: The message that appeared on websites across the internet – and what it means

Much of the internet has been hit by an issue that took major websites offline. The problems hit much of the internet: Discord, Amazon Web Services, Substack, some online games and more were offline.