Instructions for enabling debugging are here:
Simply add to your wp-config.php:
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );In any case, it seems from your screenshots that the plugin fails to read information about the installed extensions. This should happen only when you attempt to view the Dashboard section. Not sure about the exact reason but I could add some guard code to make this fail gracefully.
Do you see a problem when you visit any other page in your admin interface?
thanks