Disables debugging.

I have been puzzling why I can’t see any errors in my PHP code. Just a blank screen, even though I have constant WP_DEBUG set true. I’ve wasted a lot of time on this, until I decided to try disabling my plugins, one by one. The problem is caused by this plugin, which is disabling debugging. If I deactivate this plugin I can do some debugging. This is just not acceptable.

https://wordpress.org/plugins/slideshow-gallery/