The website was running normally earlier.
The website then came up with error 500.
Moved the wp-security-audit-log folder out of /plugins
The site came back online
Logged in
Moved the folder wp-security-audit-log back into plugins
The WP Security Audit plugin is disabled
Updated the plugin to the latest version
Activated the plugin and the site is working again
We use WP Security Audit on a few sites and we’ve had the problem a number of times now.