This plugin provides an easy way to view *.log files directly in the admin panel.
If your on a Multisite installation you have to be a Super Admin. If your on a Singlesite installation you additionally have to have the 'edit_plugins' role.
Pow! Slam! Donk! ... as stated you have to have 'edit_plugins' role. There are WordPress constants like 'DISALLOW_FILE_EDIT' which deactivates this even for the greatest of the admins. Have a look at http://codex.wordpress.org/Roles_and_Capabilities or do a websearch for 'wordpress.org DISALLOW_FILE_EDIT' and have a talk to your site maintainer.
define( 'WP_DEBUG_LOG', true ); in your wp-config.php file. This is not recommended on production environments!
That's ok ... as long as the file extension is .log and it's located in WP_CONTENT_DIR. Other sources or extensions aren't supported for now.
Yes you can! As long as they are located in WP_CONTENT_DIR and have a .log extension. Other sources or extensions aren't supported for now.
It looks like there isn't a *.log file in WP_CONTENT_DIR. Which could mean there are no errors. Yay! If there are files, it could be that they are not readable ( check your permissions ) or it's a bug ... Booo!
The options are only displayed if the file is writeable. Check your permissions.