himmingbird is hidding my whole website

I just tried hummingbird and activated the minify feature. My client website is now down!!!
the whole bottom part of the site is hidden. the backend of WP is OK all is ok except for the site not showing up.
what does this plugin do???

I checked all plugin on my WP, deleted my cache plugin, called GoDaddy, etc
can you help.
this happened after your plugin was activated.
please, can you help???

thank you!