How to Check the Server Error Log

I'm creating a site with WordPress.
The error occurred, and the error content was not displayed on a fixed page or a post page.
A white screen appears.

In order to resolve this error, I would like to check the error log on the server.
I'm a beginner and I don't know how to view the server, so how can I check it?

site is local,
VirtualBox and Vagrant use KUSANAGI.