Where is the error log stored?

linker

Core license
License owner
Joined
Apr 28, 2014
Messages
29
Points
51
Hi
I encountered a mistake in the dashboard upgrade
I found that the HTTP status code was 500 through the network in the developer's tool of the browser.
I turned on the error display of php, but the page where the error occurred was still blank.
Will the error log be saved in a directory?